Compass
Weight: 0.2kg
For many old fashioned adventurers and explorers, not even sharp sword is as important tool as a compass is.
Legend of Grimrock: the Compass is found on Level 2, in the southwesternmost room, next to a key on the floor.
Legend of Grimrock 2: Twigroot Tunnels, in an alcove that opens after you pick up the Brass Key.
The red arrow on the compass points north. It will point north even if it is not in a champion's hand (i.e. it will point north while in a champion's inventory.)