- Letter to Sir Hans Sloane.[192]
- Letter to Michael Collinson, Esq.[193]
- Letter respecting Captain Cook.
- An Address to the Public, from the Pensylvania Society for promoting the Abolition of Slavery, and the Relief of free Negroes, unlawfully held in Bondage.[195]
- Plan for improving the Condition of the Free Blacks.
- Paper: a Poem.[196]
- Plain Truth; or serious Considerations on the present State of the City of Philadelphia, and Province of Pensylvania:
- Four Letters[202] to George Whatley, Esq. Treasurer of the Foundling Hospital, London.
