Robert Bruce Horsfall
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English: Robert Bruce Horsfall (1869-1948) was an American wildlife illustrator.
Warblers of North America, 1907
MacGillivray's Warbler Oporornis tolmiei
Warblers of North America, Frank M. Chapman, New York, Appleton: 1907. 24 offset-color plates by Louis Agassiz Fuertes and Robert Bruce Horsfall (12 from each).