They signal "Send books" Good books left at the public library will be sent "over there" and to our men in camp everywhere.

They signal "Send books" Good books left at the public library will be sent "over there" and to our men in camp everywhere. LOC Summary: Poster showing soldiers and sailors using semaphore to signal with flags. Date Created/Published: New York : The H.C. Miner Litho. Co., 1917. WW1 propaganda poster provided by LOC. Original medium: 1 photomechanical print (poster) : halftone, color ; 96 x 63 cm.