John Opie oral history interview as conducted by Lisa Mighetto. Note that Mr. Opie is not an employee with the Fish and Wildlife Service, but is one of the founders of the American Society of Environmental History (ASEH).
"A Game Agent operating incognio under guise of a mammalogist from Field's Museum while investigating purported smuggling of quail from Mexico. A day's catch from a Webb County, Tex. trap line. 1-23-37"