CHAP. III.

DEPARTURE FROM TENERIFFE.—DANGER OF THE SHIP NEAR BONAVISTA.—ISLE OF MAYO.—PORT PRAYA.—PRECAUTIONS AGAINST THE RAIN AND SULTRY WEATHER IN THE NEIGHBOURHOOD OF THE EQUATOR.—POSITION OF THE COAST OF BRAZIL.—ARRIVAL AT THE CAPE OF GOOD HOPE.—TRANSACTIONS THERE.—JUNCTION OF THE DISCOVERY.—MR. ANDERSON’S JOURNEY UP THE COUNTRY.—ASTRONOMICAL OBSERVATIONS.—NAUTICAL REMARKS ON THE PASSAGE FROM ENGLAND TO THE CAPE, WITH REGARD TO THE CURRENTS AND THE VARIATION.

Having completed our water, and got on board every other thing we wanted at Teneriffe, we weighed anchor on the 4th of August, and proceeded on our voyage, with a fine gale at north-east.

At nine o’clock in the evening on the 10th [90] , we saw the island of Bonavista bearing S., distant little more than a league; though, at this time, we thought ourselves much farther off; but this proved a mistake. For, after hauling to the east-ward till twelve o’clock, to clear the sunken rocks that lie about a league from the S. E. point of the island, we found ourselves, at that time, close upon them, and did but just weather the breakers. Our situation, for a few minutes, was very alarming. I did not choose to sound, as that might have heightened the danger without any possibility of lessening it. I make the N. end of the island of Bonavista to lie in the latitude of 16° 17ʹ N., and in the longitude of 22° 59ʹ W.

As soon as we were clear of the rocks, we steered S. S. W., till day-break next morning, and then hauled to the westward, to go between Bonavista and the isle of Mayo, intending to look into Port Praya for the Discovery, as I had told Captain Clerke that I should touch there, and did not know how soon he might sail after me. At one in the afternoon, we saw the rocks that lie on the S. W. side of Bonavista, bearing S. E., distant three or four leagues.

Next morning, at six o’clock, the isle of Mayo bore S. S. E., distant about five leagues. In this situation we sounded, and found ground at sixty fathoms. At the same time the variation, by the mean of several azimuths taken with three different compasses, was 9° 321⁄2ʹ W. At eleven o’clock, one extreme of Mayo bore E. by N., and the other S. E. by S. In this position, two roundish hills appeared near its N. E. part; farther on, a large and higher hill; and, at about two-thirds of its length, a single one that is peaked. At the distance we now saw this island, which was three or four miles, there was not the least appearance of vegetation, nor any relief to the eye from that lifeless brown which prevails in countries under the torrid zone that are unwooded.

Here I cannot help remarking that Mr. Nichelson, in his Preface to Sundry Remarks and Observations made in a Voyage to the East Indies [91] , tells us, that “with eight degrees W. variation, or any thing above that, you may venture to sail by the Cape de Verde Islands night or day, being well assured, with that variation, that you are to the eastward of them.” Such an assertion might prove of dangerous consequence, were there any that would implicitly trust to it. We also tried the current, and found one setting S. W. by W., something more than half a mile an hour. We had reason to expect this, from the differences between the longitude given by the watch and dead reckoning, which, since our leaving Teneriffe, amounted to one degree.

While we were amongst these islands we had light breezes of wind, varying from the S. E. to E., and some calms. This shows that the Cape de Verde Islands, are either extensive enough to break the current of the trade-wind, or that they are situated just beyond its verge, in that space where the variable winds, found on getting near the line, begin. The first supposition, however, is the most probable, as Dampier [92] found the wind westerly here in the month of February; at which time the trade-wind is supposed to extend farthest towards the equinoctial. The weather was hot and sultry, with some rain; and, for the most part, a dull whiteness prevailed in the sky, that seems a medium between fog and clouds. In general, the tropical regions seldom enjoy that clear atmosphere observable where variable winds blow; nor does the sun shine with such brightness. This circumstance, however, seems an advantage; for otherwise, perhaps, the rays of the sun, being uninterrupted, would render the heat quite unsupportable. The nights are, nevertheless, often clear and serene.

At nine o’clock in the morning of the 13th, we arrived before Port Praya, in the island of St. Jago, where we saw two Dutch East India ships, and a small brigantine at anchor. As the Discovery was not there, and we had expended but little water in our passage from Teneriffe, I did not think proper to go in, but stood to the southward. Some altitudes of the sun were now taken, to ascertain the true time. The longitude by the watch, deduced therefrom, was 23° 48ʹ W.; the little island in the bay bore W. N. W., distant near three miles, which will make its longitude 23° 51ʹ. The same watch, on my late voyage, made the longitude to be 23° 30ʹ W.; and we observed the latitude to be 14° 53ʹ 30ʺ N.

The day after we left the Cape de Verde Islands, we lost the N. E. trade-wind; but did not get that which blows from the S. E. till the 30th, when we were in the latitude of 2° N., and in the twenty-fifth degree of W. longitude.

During this interval [93] , the wind was mostly in the S. W. quarter. Sometimes it blew fresh, and in squalls; but for the most part a gentle breeze. The calms were few, and of short duration. Between the latitude of 12° and of 7° N., the weather was generally dark and gloomy, with frequent rains, which enabled us to save as much water as filled most of our empty casks.

These rains, and the close sultry weather accompanying them, too often bring on sickness in this passage. Every bad consequence, at least, is to be apprehended from them; and commanders of ships cannot be too much upon their guard, by purifying the air between decks with fires and smoke, and by obliging the people to dry their clothes at every opportunity. These precautions were constantly observed on board the Resolution [94] and Discovery; and we certainly profited by them, for we had now fewer sick than on either of my former voyages. We had, however, the mortification to find our ship exceedingly leaky in all her upper works. The hot and sultry weather we had just passed through, had opened her seams, which had been badly caulked at first, so wide, that they admitted the rain-water through as it fell. There was hardly a man that could lie dry in his bed; and the officers in the gun-room were all driven out of their cabins, by the water that came through the sides. The sails in the sail-room got wet; and before we had weather to dry them, many of them were much damaged, and a great expense of canvas and of time became necessary to make them in some degree serviceable. Having experienced the same defect in our sail-rooms on my late voyage, it had been represented to the yard-officers, who undertook to remove it. But it did not appear to me that any thing had been done to remedy the complaint. To repair these defects the caulkers were set to work, as soon as we got into fair settled weather, to caulk the decks and inside weather works of the ship; for I would not trust them over the sides while we were at sea.

On the first of September [95] we crossed the equator, in the longitude of 27° 38ʹ W., with a fine gale at S. E. by S.; and notwithstanding my apprehensions of falling in with the coast of Brazil in stretching to the S. W., I kept the ship a full point from the wind. However, I found my fears were ill grounded; for on drawing near that coast, we met with the wind more and more easterly; so that, by the time we were in the latitude of 10° S., we could make a south-easterly course good.

On the 8th we were in the latitude of 8° 57ʹ S.; which is a little to the southward of Cape St. Augustine, on the coast of Brazil. Our longitude, deduced from a very great number of lunar observations, was 34° 16ʹ W.; and by the watch 34° 47ʹ. The former is 1° 43ʹ, and the latter 2° 14ʹ more westerly than the island of Fernando de Noronha, the situation of which was pretty well determined during my late voyage. [96] Hence I concluded that we could not now be farther from the continent than twenty or thirty leagues at most; and perhaps not much less, as we neither had soundings, nor any other signs of land. Dr. Halley, however, in his voyage, published by Mr. Dalrymple, tells us [97] , that he made no more than one hundred and two miles, meridian distance, from the island [Fernando de Noronha] to the coast of Brazil; and seems to think that currents could not be the whole cause of his making so little. But I rather think that he was mistaken, and that the currents had hurried him far to the westward of his intended course. This was, in some measure, confirmed by our own observations; for we had found, during three or four days preceding the 8th, that the currents set to the westward; and, during the last twenty-four hours, it had set strong to the northward, as we experienced a difference of twenty-nine miles between our observed latitude and that by dead reckoning. Upon the whole, till some better astronomical observations are made on shore on the eastern coast of Brazil, I shall conclude that its longitude is thirty-five degrees and a half, or thirty-six degrees west, at most.

We proceeded on our voyage, without meeting with any thing of note, till the 6th of October. Being then in the latitude of 35° 15ʹ S., longitude 7° 45ʹ W., we met with light airs and calms by turns, for three days successively. We had, for some days before, seen albatrosses, pintadoes, and other petrels; and here we saw three penguins, which occasioned us to sound; but we found no ground with a line of one hundred and fifty fathoms. We put a boat in the water, and shot a few birds; one of which was a black petrel, about the size of a crow, and, except as to the bill and feet, very like one. It had a few white feathers under the throat; and the under-side of the quill-feathers were of an ash-colour. All the other feathers were jet black, as also the bill and legs.

On the 8th, in the evening, one of those birds which sailors call noddies, settled on our rigging, and was caught. It was something larger than an English black-bird, and nearly as black, except the upper part of the head, which was white, looking as if it were powdered; the whitest feathers growing out from the base of the upper bill, from which they gradually assumed a darker colour, to about the middle of the upper part of the neck, where the white shade was lost in the black, without being divided by any line. It was web-footed; had black legs and a black bill, which was long, and not unlike that of a curlew. It is said these birds never fly far from land. We knew of none nearer the station we were in, than Gough’s or Richmond Island, from which our distance could not be less than one hundred leagues. But it must be observed that the Atlantic Ocean, to the southward of this latitude, has been but little frequented; so that there may be more islands there than we are acquainted with.

We frequently, in the night, saw those luminous marine animals mentioned and described in my first voyage. [98] Some of them seemed to be considerably larger than any I had before met with; and sometimes they were so numerous, that hundreds were visible at the same moment.

This calm weather was succeeded by a fresh gale from the N. W., which lasted two days. Then we had again variable light airs for about twenty-four hours; when the N. W. wind returned, and blew with such strength, that on the 17th we had sight of the Cape of Good Hope; and the next day anchored in Table Bay, in four fathoms water, with the church bearing S. W. 1⁄4 S., and Green Point N. W. 1⁄4 W.

As soon as we had received the usual visit from the master attendant and the surgeon, I sent an officer to wait on Baron Plettenberg, the governor; and, on his return, saluted the garrison with thirteen guns, which complement was returned with the same number.

We found in the bay two French East India ships; the one outward, and the other homeward bound. And two or three days before our arrival, another homeward bound ship of the same nation had parted from her cable, and been driven on shore at the head of the bay, where she was lost. The crew were saved; but the greatest part of the cargo shared the same fate with the ship, or (which amounted to the same) was plundered and stolen by the inhabitants, either out of the ship, or as it was driven or carried on shore. This is the account the French officers gave to me; and the Dutch themselves could not deny the fact. But, by way of excusing themselves from being guilty of a crime disgraceful to every civilised state, they endeavoured to lay the whole blame on the French captain, for not applying in time for a guard.

As soon as we had saluted, I went on shore, accompanied by some of my officers, and waited on the governor, the lieutenant-governor, the fiscal, and the commander of the troops. These gentlemen received me with the greatest civility; and the governor, in particular, promised me every assistance that the place afforded. At the same time I obtained his leave to set up our observatory on any spot I should think most convenient; to pitch tents for the sailmakers and coopers; and to bring the cattle on shore, to graze near our encampment. Before I returned on board, I ordered soft bread, fresh meat, and greens, to be provided, every day, for the ship’s company.

On the 22d, we set up the tents and observatory, and began to send the several articles out of the ship which I wanted on shore. This could not be done sooner, as the militia of the place were exercising on, or near the ground which we were to occupy.

The next day, we began to observe equal altitudes of the sun, in order to ascertain the rate of the watch, or, which is the same thing, to find whether it had altered its rate. These observations were continued every day, whenever the weather would permit, till the time of our departure drew near. But before this, the caulkers had been set to work to caulk the ship; and I had concerted measures with Messrs. Brandt and Chiron, for supplying both ships with such provisions as I should want. Bakers, likewise, had been ordered, immediately after our arrival, to bake such a quantity of bread as I thought would be requisite. As fast as the several articles destined for the Resolution were got ready, they were carried on board.

On the 26th, the French ship sailed for Europe, and by her, we sent letters to England. The next day, the Hampshire, East India ship, from Bencoolen, anchored in the bay, and saluted us with thirteen guns, which we returned with eleven.

Nothing remarkable happened till the evening of the 31st, when it came on to blow excessively hard at S. E., and continued for three days; during which time there was no communication between the ship and the shore. The Resolution was the only ship in the bay that rode out the gale without dragging her anchors. We felt its effects as sensibly on shore. Our tents and observatory were torn to pieces; and our astronomical quadrant narrowly escaped irreparable damage. On the 3d of November the storm ceased, and the next day we resumed our different employments.

On the 6th, the Hampshire India ship, sailed for England. In her I sent home an invalid, whom Captain Trimble was so obliging as to receive on board. I was afterwards sorry that I had not availed myself of this opportunity to part with two or three more of my crew, who were troubled with different complaints; but, at this time, there was some hope of their health being re-established.

In the morning of the 10th, the Discovery arrived in the bay. Captain Clerke informed me that he had sailed from Plymouth on the 1st of August, and should have been with us here a week sooner if the late gale of wind had not blown him off the coast. Upon the whole, he was seven days longer in his passage from England than we had been. He had the misfortune to lose one of his marines, by falling over-board; but there had been no other mortality amongst his people, and they now arrived well and healthy.

Captain Clerke having represented to me that his ship was in want of caulking; that no time might be lost in repairing this defect, next day I sent all my workmen on board her, having already completed this service on board the Resolution. I lent every other assistance to the captain to expedite his supply of provisions and water, having given him an order to receive on board as much of both articles as he could conveniently stow. I now found that the bakers had failed in baking the bread I had ordered for the Discovery. They pretended a want of flour; but the truth was, they were doubtful of her coming, and did not care to begin till they saw her at anchor in the bay.

I have before made mention of our getting our cattle on shore. The bull and two cows, with their calves, were sent to graze along with some other cattle; but I was advised to keep our sheep, sixteen in number, close to our tents, where they were penned up every night. During the night preceding the 14th, some dogs having got in amongst them, forced them out of the pen, killing four, and dispersing the rest. Six of them were recovered the next day; but the two rams, and two of the finest ewes in the whole flock, were amongst those missing. Baron Plettenberg being now in the country, I applied to the lieutenant-governor, Mr. Hemmy, and to the fiscal. Both these gentlemen promised to use their endeavours for the recovery of the lost sheep. The Dutch, we know, boast that the police at the Cape is so carefully executed, that it is hardly possible for a slave, with all his cunning and knowledge of the country, to effectuate his escape. Yet my sheep evaded all the vigilance of the fiscal’s officers and people. However, after much trouble and expence, by employing some of the meanest and lowest scoundrels in the place (who, to use the phrase of the person who recommended this method to me, would, for a ducatoon, cut their master’s throat, burn the house over his head, and bury him and the whole family in the ashes), I recovered them all but the two ewes. Of these I never could hear the least tidings: and I gave over all inquiry after them, when I was told, that since I had got the two rams, I might think myself very well off. One of these, however, was so much hurt by the dogs, that there was reason to believe he would never recover.

Mr. Hemmy very obligingly offered to make up this loss, by giving me a Spanish ram, out of some that he had sent for from Lisbon. But I declined the offer, under a persuasion that it would answer my purpose full as well, to take with me some of the Cape rams; the event proved, that I was under a mistake. This gentleman has taken some pains to introduce European sheep at the Cape; but his endeavours, as he told me, have been frustrated by the obstinacy of the country people, who hold their own breed in greater estimation, on account of their large tails, of the fat of which they sometimes make more money than of the whole carcass besides [99] ; and think that the wool of European sheep will, by no means, make up for their deficiency in this respect. Indeed, I have heard some sensible men here make the same observation. And there seems to be foundation for it. For, admitting that European sheep were to produce wool of the same quality here as in Europe, which experience has shown not to be the case, the Dutch have not hands, at the Cape of Good Hope, to spare for the manufacturing even their own clothing. It is certain that, were it not for the continual importation of slaves, this settlement would be thinner of people than any other inhabited part of the world.

While the ships were getting ready for the prosecution of our voyage, some of our officers made an excursion to take a view of the neighbouring country. Mr. Anderson, my surgeon, who was one of the party, gave me the following relation of their proceedings [100] :

“On the 16th, in the forenoon, I set out in a waggon, with five more, to take a view of some part of the country. We crossed the large plain that lies to the eastward of the town, which is entirely a white sand, like that commonly found on beaches, and produces only heath, and other small plants of various sorts. At five in the afternoon we passed a large farm-house, with some corn-fields, and pretty considerable vineyards, situated beyond the plain, near the foot of some low hills, where the soil becomes worth cultivating. Between six and seven we arrived at Stellenbosh, the colony next to that of the Cape for its importance.

“The village does not consist of more than thirty houses, and stands at the foot of the range of lofty mountains, above twenty miles to the eastward of the Cape Town. The houses are neat; and, with the advantage of a rivulet which runs near, and the shelter of some large oaks, planted at its first settling, forms what may be called a rural prospect in this desert country. There are some vineyards and orchards about the place, which, from their thriving appearance, seem to indicate an excellent soil; though, perhaps, they owe much to climate, as the air here has an uncommon serenity.

“I employed the next day in searching for plants and insects about Stellenbosh, but had little success. Few plants are in flower here at this season, and insects but scarce. I examined the soil in several places, and found it to consist of yellowish clay, mixed with a good deal of sand. The sides of the low hills, which appear brown, seem to be constituted of a sort of stone marle.

“We left Stellenbosh next morning, and soon arrived at the house we had passed on Saturday; the owner of which, Mr. Cloeder, had sent us an invitation, the evening before, to visit him. This gentleman entertained us with the greatest hospitality, and in a manner very different from what we expected. He received us with music; and a band also played while we were at dinner; which, considering the situation of the place, might be reckoned elegant. He shewed us his wine-cellars, his orchards, and vineyards; all which, I must own, inspired me with a wish to know in what manner these industrious people could create such plenty in a spot where, I believe, no other European nation would have attempted to settle.

“In the afternoon we crossed the country, and passed a few plantations, one of which seemed very considerable, and was laid out in a taste somewhat different from any other we saw. In the evening we arrived at a farm-house, which is the first in the cultivated tract called the Pearl. We had, at the same time, a view of Drakenstein, the third colony of this country, which lies along by the foot of the lofty hills already mentioned, and contains several farms or plantations, not very extensive.

“I went, on the 19th in the forenoon, in quest of plants and insects, which I found almost as scarce as at Stellenbosh; but I met with more shrubs or small trees, naturally produced, in the valleys, than in any part of the country I had hitherto seen.

“In the afternoon, we went to see a stone of a remarkable size, called by the inhabitants the Tower of Babylon, or the Pearl Diamond. [101] It lies, or stands, upon the top of some low hills, at the foot of which our farm-house was situated; and though the road to it is neither very steep nor rugged, we were above an hour and a half in walking to it. It is of an oblong shape, rounded on the top, and lies nearly south and north. The east and west sides are steep, and almost perpendicular. The south end is likewise steep, and its greatest height is there; from whence it declines gently to the north part, by which we ascended to its top, and had an extensive view of the whole country.

“Its circumference, I think, must be at least half a mile; as it took us above half an hour to walk round it, including every allowance for the bad road, and stopping a little. At its highest part, which is the south end, comparing it with a known object, it seems to equal the dome of St. Paul’s church. It is one uninterrupted mass of stone, if we except some fissures, or rather impressions, not above three or four feet deep, and a vein which runs across near its north end. It is of that sort of stone called, by mineralogists, Saxum conglutinatum, and consists chiefly of pieces of coarse quartz and glimmer, held together by a clayey cement. But the vein which crosses it, though of the same materials, is much compacter. This vein is not above a foot broad or thick; and its surface is cut into little squares or oblongs, disposed obliquely, which makes it look like the remains of some artificial work. But I could not observe whether it penetrated far into the large rock, or was only superficial. In descending, we found at its foot a very rich black mould; and on the sides of the hills, some trees of a considerable size, natives of the place, which are a species of olea. [102]

“In the morning on the 20th, we set out from the Pearl; and going a different road from that by which we came, passed through a country, wholly uncultivated, till we got to the Tyger hills, when some tolerable corn-fields appeared. At noon, we stopped in a hollow for refreshment; but, in walking about here, were plagued with a vast number of musquitoes or sand-flies, which were the first I saw in the country. In the afternoon we set out again, and in the evening arrived at the Cape Town, tired with the jolting waggon.”

On the 23d, we got on board the observatory, clock, &c. By a mean of the several results of the equal altitudes of the sun, taken with the astronomical quadrant, the astronomical clock was found to lose on sidereal time, 1ʹ 8ʺ, 368 each day. The pendulum was kept at the same length as at Greenwich, where the daily loss of the clock on sidereal time, was 4ʺ.

The watch, by the mean of the results of fifteen days’ observations, was found to be losing 2ʺ 261, on mean time, each day; which is 1ʺ 052 more than at Greenwich: and on the 21st, at noon, she was too slow for mean time by 1h 20ʹ 57ʺ 66. From this, 6ʹ 48ʺ, 956, is to be subtracted, for what she was too slow on the 11th of June at Greenwich, and her daily rate since; and the remainder, viz. 1h 14ʹ 08ʺ 704, or 18° 32ʹ 10ʺ, will be the longitude of the Cape Town by the watch. Its true longitude, as found by Messrs. Mason and Dixon, is 18° 23ʹ 15ʺ. As our observations were made about half a mile to the east of theirs, the error of the watch, in longitude, is no more than 8ʹ 25ʺ. Hence we have reason to conclude, that she had gone well all the way from England, and that the longitude, thus given, may be nearer the truth than any other.

If this be admitted, it will, in a great measure, enable me to find the direction and strength of the currents we met with on this passage from England. For, by comparing the latitude and longitude by dead reckoning, with those by observation and the watch, we shall from time to time, have, very accurately, the error of the ship’s reckoning, be the cause what it will. But as all imaginable care was taken in having and keeping the log, and every necessary allowance made for lee-way, heave of the sea, and other such circumstances, I cannot attribute those errors that did happen, to any other cause but currents; but more particularly when the error was constantly the same way, for several days successively.

On the contrary, if we find the ship ahead of the reckoning on one day, and astern of it on another, we have reason to believe that such errors are owing to accidental causes, and not to currents. This seems to have been the case in our passage between England and Teneriffe. But, from the time of our leaving that island, till the 15th of August, being then in the latitude of 12° N., and longitude 24° W., the ship was carried 1° 20ʹ of longitude to the westward of her reckoning. At this station, the currents took a contrary direction, and set to E. S. E., at the rate of twelve or fourteen miles a day, or twenty-four hours, till we arrived into the latitude of 5° N., and longitude of 20° W.; which was our most easterly situation after leaving the Cape de Verde Islands, till we got to the southward. For in this situation the wind came southerly, and we tacked and stretched to the westward; and for two or three days could not find that our reckoning was affected by any current. So that, I judged, we were between the current that generally, if not constantly, sets to the east upon the coast of Guinea, and that which sets to the west towards the coast of Brasil.

This westerly current was not considerable till we got into 2° N., and 25° W. From this station, to 3° S. and 30° W., the ship, in the space of four days, was carried one hundred and fifteen miles in the direction of S. W. by W., beyond her reckoning; an error by far too great to have any other cause but a strong current running in the same direction. Nor did its strength abate here; but its course was, afterward, more westerly, and to the N. of W.; and off Cape Augustine, north, as I have already mentioned. But this northerly current did not exist at twenty or thirty leagues to the southward of that Cape, nor any other, that I could perceive, in the remaining part of the passage. The little difference we afterward found between the reckoning and observations, might very well happen without the assistance of currents; as will appear by the Table of Days’ Works.

In the account of my last voyage [103] , I remarked, that the currents one meets with in this passage generally balance each other. It happened so then; because we crossed the line about 20° more to the eastward than we did now; so that we were, of consequence, longer under the influence of the easterly current, which made up for the westerly one.

And this, I apprehend, will generally be the case, if you cross the line 10° or 15° to the east of the meridian of St. Jago.

From these remarks I shall draw the following conclusion, that, after passing the Cape de Verde Island, if you do not make above 4° or 5° easting, and cross the line in, or to the westward of, the meridian of St. Jago, you may expect to find your ship 3° or 4° to the westward of her reckoning, by the time you get into the latitude of 10° S. If, on the other hand, you keep well to the east, and cross the line 15° or 20° to the east of St. Jago, you will be then as much to the east of your reckoning; and the more you keep to the eastward, the greater will be your error; as has been experienced by some India ships, whose people have found themselves close upon the coast of Angola, when they thought its distance was above two hundred leagues.

During the whole of our passage from England, no opportunity was admitted of observing, with all the attention and accuracy that circumstances would permit, the variation of the compass, which I have inserted in a table, with the latitude and longitude of the ship at the time of observation. As the longitude may be depended upon, to a quarter or half a degree at most, this table will be of use to those navigators who correct their reckoning by the variation. It will also enable Mr. Dun to correct his new Variation Chart, a thing very much wanted.

It seems strange to me, that the advocates for the variation should not agree amongst themselves. We find one [104] of them telling us, as I have already observed, that with 8° west variation, or any thing above that, you may venture to sail by the Cape de Verde Islands, by night or day, being well assured, with that variation, that you are to the eastward of them. Another, in his chart [105] , lays down this variation ninety leagues to the westward of them. Such a disagreement as this, is a strong proof of the uncertainty of both. However, I have no doubt, the former found here, as well as in other places, the variation he mentions. But he should have considered, that at sea, nay even on land, the results of the most accurate observations will not always be the same. Different compasses will give different variations; and even the same compass will differ from itself two degrees, without our being able to discover, much less to remove, the cause.

Whoever imagines he can find the variation within a degree, will very often see himself much deceived. For, besides the imperfection which may be in the construction of the instrument, or in the power of the needle, it is certain that the motion of the ship, or attraction of the ironwork, or some other cause not yet discovered, will frequently occasion far greater errors than this. That the variation may be found, with a share of accuracy more than sufficient to determine the ship’s course, is allowed; but that it can be found so exactly as to fix the longitude within a degree, or sixty miles, I absolutely deny.