Use the following combinations at the indicated lock.

Forest Hut - These are four buttons two on each side of the second story fire place / 2431
Catacombs - These are four stones on either side of the iron bars / 4132
Chimney - This is a valve by the stairs in the Arsenal District / 3241
Windmill Tavern - These are four stones on the balcony inside the tavern, all the way on the left side / 1324
Victors Secret - These are books in the bottom floor of the library in The Net of the Mask building / 1431