Staubin is a Breton Conjurer and a scholar of the Dwemer. His corpse can be found inside the Nchuand-Zel Control room. His journal lies next to him. He went inside to explore the ruins with Erj, Stromm, and Krag but was killed along with his companions by the Falmer.
The Lost Expedition is a quest to restore the ancient power of the city of Nchuand-Zel and discover what happened to the missing expedition party that went exploring within the abandoned city. The quest is obtained by reading Alethius's Notes next to his dead body in the Nchuand-Zel Excavation Site.