This image represents the panels which have been purchased to date in the nearest (N1 to 16 and W 1 to 16) northwest quadrant. I figured out how, with the help of my Open Office software, to set up this grid and load scans into it. Hurray! This was a big breakthrough for me. Now if someone will just set up a similar grid on the internet we can begin to assemble the whole map there.
I'll add other quadrants as eBay sales are made.