Falco rusticolus -- Gyrfalcon; faucon gerfaut. Alternate name on piece: Falco candidans, Iight race [Greenland falcon] Quick outline sketch, apparently copied from the layout used for publication. 9 notes on color, and "The plate wants variety and warmth with harmony of effect. HCR." all in Richter's hand. These appear to be either Richter's suggestions for coloring, or his communication of Gould's requirements. The published coloring follows the notes very closely. Artist's name(s): Wolf, Joseph; Richter, Henry Constantine.