terrifying range of ebon peaks, said to be "glassy-walled", and are believed to be honeycombed with hidden tunnels. The Eiglophian mountains cross the middle of the Hyperborean continent, with one range stretching to the south and another to the east. Mhu Thulan Mhu Thulan was a province in northern Hyperborea famous for its sorcerers. It was where the wizard Eibon dwelled, as well as many other notable sorcerers of Hyperborea, such as Zon Mezzamalech. Mount Voormithadreth Mount Voormithadreth is a four-coned extinct volcano and is the tallest peak in the Eiglophian mountains. It is the dwelling place of various horrors, including the toad-god Tsathoggua and the spider-god Atlach-Nacha. Y'quaa The gray-litten cavern of Y'quaa is the dwelling place of Abhoth, the Source of Uncleanliness. It is indirectly connected with the Cavern of Archetypes. Atlach-Nacha originated here. Y'quaa might be the true home of the enigmatic Ubbo-Sathla. Cavern of Archetypes The Cavern of the Archetypes is a vast cavern inhabited by the spectral archetypes of all life on this earth. Nug and Yeb reside here. Polarion Polarion was a region of northern Hyperborea, separated from the rest of the continent by an unnamed mountain range. It used to be a fertile place, but was later overtaken by glaciers. The White Sybil is said to originate from here. Notable denizens Voormis The voormis are the three-toed, umber-colored, fur-covered humanoids that once had a thriving civilization in Hyperborea. They dwelled underground and worshiped the god Tsathoggua. After most were wiped out by other pre-human settlers, the most savage of the Voormis became restricted to caves in the upper slopes of the Eiglophian mountains. Before Hyperborea's fall, the remaining Voormis were hunted for sport. Citizens Athammaus Athammaus, who appears in Smith's "The Testament of Athammaus", was the headsman, or executioner, of Commoriom before its downfall. He was also one of the last to leave the city when the population fled to Uzuldaroum. Afterwards, he recorded a chilling testament of Commoriom's final days. Athammaus was descended from a long line of headsmen. A consummate professional, Athammaus always took great pride in his skill and never shirked his official duty. His career suffered in Commoriom when he faced the task of executing the outlaw Knygathin Zhaum, but he later resumed it in Uzuldaroum where he served 11 lusters . Eibon Eibon, a character in Smith's "The Door to Saturn", was a sorcerer and priest of Zhothaqquah