CONCHOLOGY -- A collection of 22 fine original pen and ink, and watercolour, drawings of shells, heightened with varnish, each showing one kind of shell from above and below, with a pencil attribution above, and a pen and ink 'Fig. no.' in the top right hand corner, 2 plates additionally inscribed in pencil at head '(?)Thorn 2 Sept [18]28' and 'Wright May 10 [18]33', size of page [one page cut down to pen and ink border]: 14 x 11½ in. (355 x 290 mm.) (22)