BONNYCASTLE, John. An Introduction to Astronomy. In a Series of Letters, from a Preceptor to his Pupil… the third edition. London: J. Johnson, 1796. 8vo (200 x 125mm.) 19 folding engraved plates. (Offsetting, browning and spotting, some occasional damp staining and soiling, 3 plates damp stained, 1 plate soiled.) Late 19th Century cloth (worn, damp stained, loss to spine). Provenance: A. and M. Eliot (inscription dated 'June 5th 1882' to front-free endpaper, label inscribed 'Litchfield Green, Tottenham' to front pastedown).