H. P. Lovecraft illustration, Dave Carson. 1993.
Map from AD&D/Call of Cthuhlu Scenario Ancient & Modern from White Dwarf 80, August 1986. Tim Sell, 1986.
In this scenario for two system events in 1920s Europe and the antediluvian land Theem’hdra from Brian Lumley’s Cthulhu Mythos fiction cross over. The CoC investigators were ideally real-life ancestors of the players, the AD&D characters were their really ancient ancestors.