Or Winsor McCay, as Google--and indeed, pretty much the entire internet--insists on spelling it. Anyway, he's an animator and cartoonist, responsible for the comics A Tale of the Jungle Imps by Felix Fiddle, Little Sammy Sneeze, Dream of the Rarebit Fiend, The Story of Hungry Henrietta, A Pilgrim's Progress, Poor Jake, and most famously, Little Nemo in Slumberland.
I wouldn't mind getting a look at Little Nemo--I'm given to understand it's got a charming surreality and creative spirit to it. I wonder if I could find it online? It's bound to be public domain by now...
I get the feeling that this sequnce is what most people think of when they think of Little Nemo