I found another tearsheet from an old magazine in my files, with photos of these three cartoonists. Don't know what magazine it was, but I suspect it was an art or literary publication from the 50's (maybe like today's "Writer's Digest").
Below each photo I've typed in the captions exactly as they appeared. Now, I don't know of a cartoonist named "Barney Tobin", and I suspect that was a typo for "Barney Tobey". Does anyone recognize him or the cartoon he's working on?
If I'm mistaken and there really is a cartoonist named Barney Tobin, my sincerest apologies. Caption: "The craziest inventions of them all, courtesy — lo, these many years — of veteran Rube Goldberg." Caption: " 'I dreamt I stepped outside for a breath of fresh air . . . without my Maiden-form Bra.' Not the caption for one of Whitney Darrow's famous cartoons, but for the subtle, delicate drawing behind his head." Caption: "Drawingboard, paper, pen, sneakers, checked sportshirt — the paraphrenelia of the successful cartoonist, as becomingly modeled by Barney Tobin." [Barney Tobey??]