Looked a little more into it, they weren't actually the very first eaten but were the first (and by some accounts only) to be murdered for the purpose of eating. They both refused to eat human meat before fleeing (they'd been warned their murder was being planned), but were caught up with down the trail a few days later. Shortly after they were butchered the group (a segment of the party that had been sent ahead) that did it were harboured and fed in a Miwok village (the guides having also been Miwok I think). A grizzly tale.