The cells in the dungeon of Wilde Manor hold dark history filled with blood. Most due to Morgan le Fey and her immediate descendants. Muggleborns were sometimes captivated by the family and tortured. Supporters of the muggleborn's cause were taken in as well. And muggles who tried to burn witches. After the medieval times, the brigs were used for muggles who happened upon the manor and were obliviated. As in the spell. And the hunt for muggleborns also continued, but much less interest in it during the 1700rds. When the world rounded over to the 20th century, the Wilde bloodline stopped caring about bloodstatus and started seeing the world in a new perspective. But other wizarding families started paying the Wilde family back for their criminal acts, and quite a few of them were killed.

The last couple of centuries, the brigs have been unused and left to rot.