The massive limestone bulk of the Federal Bureau of Investigation headquarters fills this linen-era card with institutional authority — American flags flying from twin poles, a lone red fire hydrant punctuating the sidewalk, and the faintest hint of wartime urgency in the postmark machine's patriotic slug: "Buy Defense Savings Bonds and Stamps." Mailed from Washington, D.C. on October 13, 1941 — just eight weeks before Pearl Harbor — by a traveler named Elsie to her friend Mrs. H.O. in Cuyahoga Falls, Ohio, the message is pure tourist wonder: "I am having a very much prized visit here. There are so many beautiful things to see. Will probably miss many of them." The building described on the back housed not only the FBI but also the Bureau of Prisons, the Division of Identification, and a small museum of articles associated with noted criminals — a detail that must have thrilled visiting tourists in the Hoover era.