Today marks Dave Arneson's birthday, commemorated as Dave Arneson Game Day, across the internet. Consider heading over to Havard's Blackmoor Blog for more details.
The Blackmoor Castle's History:
Main Gate to Blackmoor Castle. Illustration by Ken Simpson, presumably based on the original by Dave Arneson.
Haunted Rooms and the Like:
The next section describes locations within the castle, such as the Black Hall, the Catacombs, and Blackmoor Tower. The accompanying map is unkeyed:
Map of Blackmoor Castle, from JG 37 "The First Fantasy Campaign". For a later version, drafted for Origins 1984, see this post from chirine's workbench.
A) The TombsB) The Gallery of the UndeadC) The DungeonsD) The Wizard's PitE) The Black PitF) Miscellaneous
1) The Gray Room2) The Secret Room3) The Lair4) The Library