Vaux, R. (1815). Memoirs of the lives of Benjamin Lay and Ralph Sandiford: Two of the earliest public advocates for the emancipation of the enslaved Africans. Philadelphia: Published by Solomon W. Conrad, no. 187, High-street.

Vaux, Roberts. Memoirs of the Lives of Benjamin Lay and Ralph Sandiford: Two of the Earliest Public Advocates for the Emancipation of the Enslaved Africans. Philadelphia: Published by Solomon W. Conrad, no. 187, High-street, 1815.

Vaux, Roberts. Memoirs of the Lives of Benjamin Lay and Ralph Sandiford: Two of the Earliest Public Advocates for the Emancipation of the Enslaved Africans. Philadelphia: Published by Solomon W. Conrad, no. 187, High-street, 1815.