In a fit of madness last night, I pulled out an ancient D&D map and copied it into InkScape room by room. This was the first level of a small dungeon I created back in 1978 or 1979. There are about 30 levels total in this monstrosity. This particular level was originally drawn on two sheets of four-lines per inch graph paper. There are some details missing, like a bunch of scribbled markers for puddles, moss and mold, but it's mostly intact. The original was also rotated counter-clockwise 90 degrees, but this fits the page a bit better.