(Washington), (Government Printing Office), (1921). The first separate appearance of this essay by the celebrated mammologist: an offprint from the 1920 Yearbook of the U.S. Department of Agriculture. Delineates threats to wildlife, including habitat loss and over-hunting, and the ensuing loss to the "recreational and educational advantages arising from an abundance of wild life." "Free" hand-written in upper corner; side-stapled pamphlet; near fine. [#035026] SOLD