I mentioned in a post a while back that I didn't care much for the character of the Shaggy Man when I first read about him in The Road to Oz. I did become fonder of the character, and L. Frank Baum used him in the next few books, giving him a large role in Tik-Tok of Oz. After this title, he seemed to fade away, and was not used as frequently.
Here I have a drawing by John R. Neill of Shaggy from Tik-Tok of Oz. This was used as a chapter tail on page 250. The image was slightly trimmed in the book - the whiskers extending beyond the rectangular border on either side were removed. He must have been too shaggy!