Most of the early comic pages were thumbnailed on printer paper I had handy. These look like they're pages 17-19, with some bonus ink nib tests and Squidward, because why not.
My paneling is not terribly interesting; back then I was mentally dividing each page into 3x3 panel grids, which made for a lot of crowding. I eventually smartened up a little and changed to 3x2 panel grids, which reads easier and is better for drawing.
That's all the concept art for now! Come back on January 9 for the beginning of the comic!