Herriman was what Wikipedia calls a "Louisiana mulatto creole." who "passed" for white. His family spoke French. He might have been self conscious about his mixed ethnicity because he disdained publicity and was kidded by friends for his reluctance to take off his hat.
Early on he did a comic strip in the German style about a black guy named Mose (above) who always tries to pass himself off as white. On first glance all the humor seems to be at the expense of Mose, but that's only the McGuffin. Half the joke comes out of the whites who are over-the-top tickled to death to be Scottish or Irish and who take any opportunity to dance an Irish Jig or a Highland Fling.
I wonder if anyone ever captured Herriman on film. I'd like to hear his voice.
Herriman had one of the great hats of his era. He looked great in it! As a matter of fact, more than any other artist of his day, he looked like a cartoonist.
Of course he always looked a bit awkward in photos. He may have had naturally broad shoulders but it's also possible that he had normal shoulders and simply liked to "puff up" for pictures.
Maybe he was self conscious about being short.
So far as I know, Herriman was the best caricaturist of himself. He did a couple of frequently reproduced back shots of himself, one of which is reproduced above. These influenced me immensely, to the point where I feel my life will have been will have been lived for naught if I don't do a project built around frequent back shots.
YIKES! A RETRACTION: According to commenter "nodnarB," that caricature of Herriman was actually done by cartoonist Tad Dorgan, who shared an office with Herriman. That's an example of Dorgan's work above.
Above, another Tad Dorgan. Geez, the world must have been a different place in that era. The spittoon, the friendly bartender, the practical jokers who all go to the bar at night to drink together, the blank wall...it's so different than what's around now.