William Carey (1792). “An Enquiry Into the Obligations of Christians, to Use Means for the Conversion of the Heathens: In which the Religious State of the Different Nations of the World, the Success of Former Undertakings, and the Practicability of Further Undertakings are Considered,”, p.7
Ichabod Smith Spencer (1856). “A pastor's sketches: or, Conversations with anxious inquirers respecting the way of salvation. With an intr. and ed. notes, by J.A. James”, p.23