OSR enthusiasts still debate the best way to map wilderness areas with hex grids, but 1/4"=5 miles was good enough for author Dave Hargrave and mapper Carolyn Schultz in Death Heart: Arduin Dungeon 4 & Overland Adventure (Grimoire Games, 1980).
This adventure takes place in the Mountains of Madness, a name borrowed from Lovecraft. This map also shows the three previous Arduin Dungeons: The Howling Tower, The Citadel of Thunder, and Caliban's Seat, the latter taking a name from Shakespeare's The Tempest. Other references within include a rough stone shrine to "Pukel" by the path (from Tolkien) and a +3 sword named "Black Raiser" (a nod to Blackrazor from White Plume Mountain, published the previous year, another adventure with a non-gridded map).












