Madam Batdorf's Red Ledger Clue

Plot clue linked to Madame Batdorf's Bone Charm Set: Madame Batdorf believes she is supposed to be with "the red ledger kid" and asks Ash to find them. Any time the Bone Charm is consulted about ledgers, poison, gnoll witchcraft, or cooking-medicine, the DM may provide one pointed hint that moves the party toward the red ledger kid.