A vivid hand-tinted chrome-adjacent view of the Pan American Union building in Washington, D.C. — its white marble Beaux-Arts facade glowing under a patriotic double-flag display, with a handsome open touring car (likely a 1914–1916 model) parked at the curb — carries a poignant personal message: "Uncle Bonnie: Walter had leave here for Europe Oct. 29th. I was to let you know. How is everything + everybody. Write me a line. Love to everyone — Nina." Postmarked Cleveland, Ohio, October 17, 1917 — just months after the United States entered World War I — Nina's note to Bonnie in Port Huron, Michigan documents a family's anxious farewell as Walter shipped out to Europe, one of millions of American servicemen who crossed the Atlantic in 1917–18. The Pan-American Union building, completed in April 1910 at a cost of $1,000,000 and maintained by the twenty-one American republics, is today the headquarters of the Organization of American States. Published by B.S. Reynolds Co., 1202 D St. NW, Washington, D.C., with a 1¢ Washington stamp and Cleveland machine-slogan cancel.