No date for this Saturday Evening Post cartoon, but we can tell by the style that it's early 1960s.
Don has sold a LOT of cartoons in his career. Each numbered cartoon or illustration on the left side of this Blog is from a DIFFERENT magazine, newspaper, etc. Let's see if we can find out the total number of publications (places) where Don's work has appeared . . . . . (An unnumbered posting is a duplicate publication.)