Skyrim Special Edition (PC mod) Gerheardt's Settlements part 4
4Gerheardt's Settlements :
https://www.nexusmods.com/skyrimspecialedition/mods/110998
Final location is Reachwater, consists of an old mill and destroyed house, nothing else, that's it. Adds to the scenery, nothing more to say.
So I toggled the map markers, went to Halfmoon Mill and down to the alchemist's camp, looked around, no key, went to where his dead body is at, checked his corpse, no key, looked around briefly (and killed all of the spriggins) and thought, well, either something overwrote it which I didn't think so, or the house at Hatchet belongs to another alchemist, after all it is Skyrim and there are plenty practicing magic, enchanting, alchemy, those sorta things. So I went back to Hatchet, killed the Lurchers, and some mad passerby with a beholder, waited until daylight and then did a fly around of the community and thought, well, I would think his body would be close by, so let's check up here first, if not here, towards Ivarstead maybe. Found him, killed by a big white bear, got the key, opened the front door of the house and then sat and relaxed on the patio.