First Dungeon Map in 30 years

Believe it or not, I have not made a lot of dungeon maps. I can only remember two actual underground maps, both made very early on, probably before 1978. Recently, I've been using +Dyson Logos maps for most of my dungeon map needs.

When +Erik Tenkar mentioned opening up his Tenkar's Landing sandbox to crowdsourcing, I leapt at the chance to draw and stock my own dungeon map.

In preparation, I decided I needed some practice. Last night I started doodling a wizard's tower and dungeon beneath it. Here is the result so far -- a ruined tower and the first level of dungeon:

This was drawn with a Pentel Precise V5 Extra Fine pen on my 3.5" x 5" Rosehands notebook.