The first records of Emmanuel Matthias Cross on archive with the Adeptus Mechanicus, are the ones held on the black box devices recovered from the now barren Gryphonne IV. Although the records conflict with current status as they list him as only a grade three mech-wright allocated to the plasma reactors on forge secundus, however his current appropriation of the title Magos seems legitimate as the records cease approximately a hundred years before the planet's destruction.[]
Indeed, the final entries detail him as joining the Enlightened Order of Advent[1](of which there are no detailed records), yet it is hypothesised that he left the forgeworld mere months before the Tyranid invasion.[]
It is speculated (owing to scant reports) that his movements progressed from Gryphonne IV to the Segmentum Solar and to Mars, and he became embroiled with the Necrontyr crash sites and the disappearance of the Inquisitorial Representative on Terra.[]
The motives surrounding his sudden appearance in the Carthax sector are currently unknown, but recently his name has appeared on the crew manifest as a passenger onboard the trading vessel; The Coelacanth. The nature of the bargain or business that has been agreed between himself and the shipmaster remains a matter of speculation.[]