Turns out the groundhogs had nothin' to do with the missing Land Grant but there were some sightings of the thief around the Inn. Better stake it out. Leave no Feather Bed unturned!
In-Game Hint
Feather Beds are crafted in the Sawmill and require parts from the Barn and the Chicken Coop.
Pioneer questioned some eye-witnesses and found the thief's hideout! Time to go get that Enormous Land Grant back and share some free tools with friends.