I've added a handy link over to the right there under the "Sham's OD&D Stuff" section for all of the PDFs I've loaded to Orbit Files for The Dismal Depths. I'm planning to share some more of the files as I work on the megadungeon, but the grand plan is to make a complete 10 level (42+ map) dungeon crawl adventure suitable for campaign play with enough creative space for referee's to make it their own. At my current work pace this will take some time, but I feel this might be a project which is a more reasonable undertaking than the much wordier, involved Ulin-Uthor, The Dim Expanse megadungeon. Hang in there! I'll be adding some information to the project in the near future after completing some other more pressing creative efforts.
Anyway, there's the link I promised but forget to announce properly.
~Sham, Quixotic Referee