The Mars Cycle

The Mars Cycle comprises Clark Ashton Smith's four sci-fi horror stories concerning the red planet:

The Vaults of Yoh-Vombis (Weird Tales, May 1932)

A group of explorers on Mars venture into the subterranean passages of a long-abandoned city ... with unfortunate consequences.

The Dweller in the Gulf (Wonder Stories, March 1933)

Three earthmen explore a mysterious cave system on Mars...

Vulthoom (Weird Tales, September 1935)

Two Earthmen on Mars find themselves trapped in the heart of a vast, underground city...

Seedling of Mars (Wonder Stories Quarterly, Fall 1931)

A great Martian being makes first contact with the human race...