Andy's Early Comics Archive is a look at the long and winding past that is sequential art. While you could debate whether some of these items fill the "comics" definition, it is the most thorough collection of comic-styled art I have seen. I highly recommended swinging by and seeing the elements incorporated within such beautiful art.

The articles on Early Speechballoons in Cartoons and Early Speechballoons in Comics are particularly one-of-a-kind.