From GameWatcher: “The Wild Appalachia update for Fallout 76 brings with it the first significant serving of content for the survival RPG. Among these additions, players also have a new series of quests to play through. Some of them, such as Fallout 76 Baa Baa Black Sheep involve summoning your inner detective.
Here’s where you can find all the Fallout 76 Baa Baa Black Sheep clues.”
Source: N4G PC Fallout 76 Baa Baa Black Sheep – Where to find all the Clues?