Although no mention of Private Thorsen is found in these records, hidden within the binding of one of Herod's ledger books is a small, brass key.$B$BAnd after further study of his notes, a few references to a "secure strongbox" are contained among various papers.  The box is somewhere within the Stockpile - the cavern complex at the back of Kurzen's Compound.$B$BIf this secure strongbox is found, and the small brass key can open it, then perhaps the mystery behind Thorsen's detection will be revealed.