Editing Lyster Larrey (section)

===In the Emperor's Service===
In the wake of the union of Mars and Terra, Larrey was recommended by the Fabricator General to be the Martian liaison to the Legion Apothecarion School on Terra, there to learn more about the Space Marines and their unique biology so that Mars could use that information to perfect their new forms of armor and equipment. It was during this time that Larrey met and befriended a member of the XIIth Legion's Sacred Band with a deep interest in genetics named [[Wilmut Sachs]]. This connection would later bring doom to both. His time with the Apothecarion was short but productive, and Larrey could now add a deep and growing knowledge of Astartes Biology to his many talents.

Shortly after the Treaty of Mars, Larrey's old rival Pallas Eugenesis recommended that he take responsibility for supervising the gene-seed of the [[War Scribes|Second Legion]].  This gesture came as a great surprise and Larrey was greatly moved by the apparent conversion of Pallas from a petty and grasping monarch to a believer in Imperial unity.  He was even more delighted to find that the work involved bringing the newly-discovered Primarch [[Arelex Orannis]] into his laboratories to provide tissue samples.  Larrey was able to duplicate Pallas's achievement of incorporating Primarch genetics into the Legion gene-seed with the Second Legion, strengthening and stabilising the gene-sons of Orannis.  When news of this great work reached the Emperor, He personally requested that Larrey be seconded to Him as part of the [[Legiones Astartes (Hektor Heresy)|Legiones Astartes]] expansion project.

Larrey was deeply impressed by the Emperor’s skills and his laboratories, and was swiftly integrated into the Emperor’s team. His knowledge of how implants bonded with their human hosts meant that the number of rejections of gene-seed was reduced by a third, and his input led to a number of improvements to the implantation process. Many of the human and Selenar gene-wrights called him ‘The Mad Magos’ for his endless enthusiasm for his work. Though he was held in high regard, there was one thing that remained off-limits to him.  Despite Larrey's constant requests he was forbidden to experiment on improving on the gene-seed or organs used to create Space Marines. To Larrey this restriction was a source of great frustration.  His reports continually made reference to possible improvements, creating a rift between him and his peers. When several illegal experiments on modifying such organs as the Occulobe and the Ossmudula were uncovered, he was unrepentant. Finally, the Emperor was forced to order him to leave Terra. Larrey felt betrayed, cast out over an earnest desire to ensure that the Astartes project would continuously grow, develop and improve. He had never been popular on Mars and his old associates had little interest in giving him sanctuary. After a period of drifting, the Genetor was surprised to find a more permanent refuge at Crater City, under the protection of the kindly young Forge Lord [[Vilyon Luthier]].  Although relatively secure, Larrey's skills were ill-suited to work at a Forge City specialising in civilian goods.  He simply did not know what to do with himself.