Doonesbury by Garry Trudeau for February 28, 1972
B.D.: What exactly are we looking for, Phred? Phred: A cache of supplies my men hid in this area. B.D.: What? Phred: Hey, here it is! It's a box we stole from the U.S. supply depot last month... B.D.: What's in it? Phred: Don't know. We were discovered and had to leave it behind... B.D.: Beer! Phred: "Schlitz"?