Drawing depicting: Unidentified Pteroglossus sp. ?, Gould 2036-2041 share a dynamic which suggests the hand of Hart; all 5 include a principal bird perching, or in the case of Gould 2040 flying, in a downward diagonal., Drawing on tissue. 2 toucans ca. 14" long (Gould's birds are "the size of life" unless stated otherwise) with a strongly hooked bill. Not found in the published editions of the Monograph of the Ramphastidae, or family of toucans. What the purpose of these drawings may have been is unclear; perhaps Gould intended a further revision and extension of the work.