Board Thread:Lore Discussion/@comment-71.82.250.138-20130206082748/@comment-88.112.153.73-20140303155042

I believe he was in Apocarypha, Hermaeus Moras plane of Oblivion at the moment when the Dwemer disappeared.

He was also infected with Corpus, which could possibly somehow modify his soul, meaning that he wasn't recogniced as a dwemer by who ever it was, who was responsible for the Dwemers disappearance.