The Circumcision Knife is located in the Observatory which is the north western building inside the Villa Caruso mansion grounds. It is mounted on a display table in the north western corner of the ground floor, right next to the also mounted Plague Doctor disguise. There is also an Amputation Knife on another table on the opposite side of the costume.
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|Lethal Melee||Amputation Knife - Battle Axe - Circumcision Knife - Cleaver - Fiber Wire - Fire Axe - Folding Knife - Hatchet - Kitchen Knife - Letter Opener - Saber - Scissors - Screwdriver|
|Non-Lethal Melee||Baseball Bat - Bust - Crowbar - Expired Can of Spaghetti Sauce - Fire Extinguisher - Fire Poker - Golf Club - Hammer - Lead Pipe - Police Baton - Pool Ball - Shovel - Soda Can - Wrench|