A Caution and warning to Great-Britain and her colonies : in a short representation of the calamitous state of the enslaved Negroes in the British dominions. ; Collected from various authors, and submitted to the serious consideration of all, more especially of those in power. ; To which is added, an extract of a sermon, preached by the Bishop of Gloucester, before the Society for the Propagation of the Gospel / by Anthony Benezet. Philadelphia : |b Printed by D. Hall, and W. Sellers, at the new printing office, in Market-street, 1767.