Robert E. Howard produced several series: Solomon Kane, Kull of Valusia, Bran Mak Morn, and finally Conan the Cimmerian, all existing more or less in the same world at different times. In “Kings of the Night” (Weird Tales, November 1930) he tied Kull with Bran Mak Morn through magic, as he did Turloguh o’Brien and Bran Mak Morn in “The Dark Man” (Weird Tales, December 1931). The patient scholar can find clues that weave all his series together in one way or another.
There was one more series in Howard’s pseudo-history that concerns readers of Sword & Sorcery. The tales of James Allison take place both in modern times and in the far past, in that time after the Hyborian kingdoms of Conan. Allison is a crippled Texan who lost a leg when his horse fell on him. To escape boredom and sadness he ventures into the past, exploring his previous lives as mighty warriors. All these ancestors were members of a migration of Aryans as they traveled the world in search of a homeland.
Read the rest:
https://amazingstories.com/2013/03/the-james-allison-stories-dreaming-of-the-past/
