eq mob:Calderius  

Calderius (click for map image) spawns in the easternmost room of the second floor, in the Anetarx Extraction Lab: PH "a worn arc worker".

Map point for "arxmentis.txt" map files (for all Arx Mentis named map points, see this quest entry):

• P 287.5365, -89.2367, 80.2014, 127, 0, 0, 1, Caldarius