Decades before Horton heard a Who and the Grinch stole Christmas, Theodor Seuss Geisel was an ad man. Returning from an aborted post graduate stint at Oxford in 1927, he needed a way to pay the bills.
His zany creatures turned out to be perfect salesmen for everything from motor oil and beer to mosquito repellent, lightbulbs, Fords and, yes, even Standard Oil.
Geisel's ad characters aren't exactly the Cat in the Hat or Red Fish, Blue Fish, but you'll recognize similarities in the furry, droopy creatures that graced the pages of magazine ads well into World War II — when he he did these cartoons. His career writing children's books didn't take off until the '50s, but as most of us know (and if you're from the U.S. and didn't grow up reading Dr. Seuss books, who are you?), he did pretty well.