McCay was ahead of his time with his illustrations. When the comic first ran, it didn't quite catch on because it wasn't particularily funny. It's understandable; many of the strips are dark and some aren't dreams but more night-mares, so i can see why a boy Nemo's age wouldnt care for it. Reading it now, it's easy to forget how novel McCay's work was; swallowing moons, glass caverns, spaghetti-legged beds--it's really remarkable.
I'm reading through them as they were published, and i havent even made a dent, but i love it so far. in particular these:


Finally, this one is wonderful. Cupid lets Nemo take his pick of any of the fine Valentines to be his:



i am in love with these. especially the art style, so beautiful. i'll post some more that i find.
** i know they get cut off, so click on the pictures to see them in full!