Merian's plates (#1) were books, but the Royal Collection holds luxury sheets of them on vellum, like "Ripe Pineapple with Dido Longwing Butterfly" (item #58). The Trust's note says she inked parts of her etched plate and pressed vellum against it while wet, so mostly the insects transferred, and the rest was painted by hand, probably with her daughters' help. Because she moved the butterflies between copies, no two sheets share a composition. …

Georg Dionysius Ehret's "Characters of flowers" (#50, V&A) is a sheet 55 cm tall that does two jobs at once: dissected flower parts, each with its note beside it, and in one corner a pair of drawn pages that overlap as if pinned there, carrying the whole plant. Ehret drew it, etched it and published it himself. …

Sean Vidal Edgerton (#25) says that when a specimen arrives broken, he rebuilds the missing flower, fruit or cross-section anyway, because describing a new species needs every part on the plate. His sequence is slow: hours of looking, geometric blocking, tracing-paper drafts a curator signs off, then ink on vellum. …