A lot of people don't know that Herriman tried several different styles before he settled on the Krazy Kat style that he's most remembered for. When he first started out in 1901 he worked in the German style of the day, and was pretty good at it. That's his very first strip, above. It was done for Pulitzer's New York World.
How do you like the story?
Only two months later we find him experimenting with an illustration style (above).
By 1902 (above) he's dumped illustration and tries pure cartooning, a bit in the Opper/"Kattzenjammer Kids" style.
He comes under the influence of a lot of other artists in 1902, possibly including Windsor McKay (above).
Now HERE'S (above) an interesting strip! It looks like something Milt Gross might have done, or maybe the young Sterrett. My source attributed this to Herriman, with a date of 1903, but I can't remember where I got the picture from, so I can't check it. If Herriman did draw this then it seems fair to say that both Gross, Sterrett, Barks and others were influenced by this strip, and Herriman the copier of others transformed during this period in to Herriman, whom others copy.
Gee, I got to say "whom."
I'm aware that Gross fans will find this connection between Herriman and Gross to be shocking. I'm not a historian, so if I'm wrong I hope a reader will let me know.
Somewhere in this period Herriman began to experiment with a scratchy pen and ink style. You see it in some of Herriman's "Baron Bean" drawings. I'm guessing that he got it from Bud Fisher, who did Mutt and Jeff.
I wonder if Kurtzman was influenced by this strip. Some of the Baron Bean sketches (not shown) look like Kurtzman's could have drawn them.
By 1907 (if not earlier) Herriman had perfected yet another style (above). Maybe it came out of the political cartoons he was doing in in 1904 and 5. This is my hands down favorite Herriman
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With Krazy Kat, Herriman's pen and ink style evolved even farther, Here the scratchy, funny lines appear slightly liquid, as if they were brushed on. Were they? I don't think so. Maybe he smeared his ink lines with a little benzine. Or maybe the lines look liquid because they weren't photocopied right. I wish I knew.