Drawing on tissue; some correcting lines, and a marginal sketch in charcoal. Artist's name(s): Hart, William Matthew. This appears to be a redrawing by Hart of Richter's published plate, Monograph of the Trogonidae, or family of trogons 2: 10, with a completely new background and the omission of one of the three birds. There seems to be no obvious reason for such an undertaking.