Public domain
J. Edgar Hoover, Dir. of F.B.I., in his office, April 1940
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineJ. Edgar Hoover, Dir. of F.B.I., in his office, April 1940. 1940-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.