Drawing depicting: Trogon collaris -- Collared trogon; Trogón de collar. Alternate name on piece: Harpactes hodgsoni, Apparently by Gould with minimal overworking by Richter, Very rough layout drawing; 3 marginal sketches of eye and beak; arithmetical calculations; large number "9." Reverse: at top of page "Brownlow At Holbo . . . [?]"