Doonesbury by Garry Trudeau for February 24, 1972
Phred: Well, here we are, deep in the heart of the delta jungle, huddled around a fire as if our very lives depend upon it, which in fact they do. B.D.: Right you are, Phred! If it weren't for this wearm, friendly fire to scare off wild beasts, the story of our valiant struggle for survival might have been a short one...I wish we had some marshmallows.