Going through the pages, it seems the mage was working on recreating a race that was _built_, called Warforged. They were called that because the various nations and races of the time they were created ,Pre-Dragonfall (more than a millenium ago), were at war with each other, and some nations didn't won't to throw away lives (particularly dwarves and elves). So they built soldiers. The Warforged have sentience, but were usually built with orders and basic personalities in their minds, usually starting at the human equivalent of 25. It was noted that miscellaneous magic used at the time of creation could cause unusual effects. But the unnerving part of these papers is in a section of handwritten notes.
"... I've finally got the formula right, but Thanatos wants me to modify it immediately! He doesn't seem to get that this is delicate work, and it will need _careful_ adjustments just for different base forms! I get that he can blast me into dust, and that his lackeys spread across the country, but can't he give a guy some space to experiment? For a lich, the guy's remarkably impatient. He wants me to mass produce, and experiment at the same time? It's not possible! I said so, but gave a list of what all he'd need to mass produce them, and a good idea of where to get the crystals. I know better than to say can't do without a solution! The prick he sends finally left me alone, so I'll get back..."