These were part of the 2011 OSR Challenge: A September of Short Adventures
from the Introduction:
A September of Short Adventures was an OSR Challenge initiated in 2011 by Matt over at the Asshat Paladins blog. …
No maps. Few NPCs. Make the adventures usable right from the post. Keep description to a minimum. No casts of thousands — unless it’s an invading horde of three-eyed orcs riding purple wombats.
We thought so…
This publication is available as a free download from the designers' blog.