Scope and ContentPostcard: "You know I'm lonesome." Postmarked Hoboken, August 17, 1918; U.S. Post Office added inkstamp message: Buy War Stamps from your Letter Carrier. Color lithographed card, 3-1/2" x 5-1/2" wide; divided back. Publisher: Edward Gross Co., N.Y. Series: Smile Messengers Stock no.: Comic No. 423 Promotional message added by a department of the federal government (Post Office was then a cabinet department) to raise additional revenue to be used towards government expenditures for World War I efforts.