URL: https://digitalcollections.hoover.org/objects/37834 Collection Structure Poster collection > Beware of spies, the enemy has ears everywhere. Don't talk about what you have done or are going to do ... Don't forget to report at once any person ... Secrecy means safety. Item Title Beware of spies, the enemy has ears everywhere. Don't talk about what you have done or are going to do ... Don't forget to report at once any person ... Secrecy means safety. Collection Title Poster collection Artist S., F. Publisher Central Map Reproduction Plant. Engineer School. Washington Barracks, D.C. Date Created 1914/1918? Description Drawing of German cross and bloody fingered hand placed to ear. Text to left, right, top, bottom. Subject(s) Spies Social aspects World War, 1914-1918 Espionage, German United States Rumor Language(s) English Country of Origin United States Country of Origin United States Place Published Washington, District of Columbia, United States Dimensions Overall: 14 x 10 in. (35.6 x 25.4 cm) Format Poster Medium political posters Color color Color color Hoover ID Poster US 4567 Record Number XX343.28210 Collection Guide https://oac.cdlib.org/findaid/ark:/13030/kt829015km Rights No known restrictions.