"Title:" Keep mum chum "Abstract:" Poster suggesting careless communication may be harmful to the war effort, showing an army cap and a hand sinking in water. "Physical description:" 1 print on board (poster) : silkscreen, color. "Notes:" Date stamped on recto: Jan 21 '43.; Work Projects Administration Poster Collection (Library of Congress).; Hand-written on recto in pencil: Designed by William B. Finley.