Disapproving kitten disapproves.
Animal Protective League Letter, 1957. Source: Wisconsin Historical Society.
Letter from Marie Thompson of Milwaukee, Wisconsin, President of the Animal Protective League to John Beale, Chief Forester at the Wisconsin Conservation Department regarding the use of DDT. The letterhead consists of photographs of a dog and a cat. The left margin lists prominent anti-vivisectionists.
(via oldtimeycats)