Not a lot is known about him. He was a bit of a paranoid recluse. After the town was built, he chose to build his home outside of it. His only true companion after that was his man servant, Martin Wilkes.
Upon his death, Crowley left his whole estate to the Wilkes family, making them caretakers of the Manor.
Mortimer had one child, Jocelyn, who after his death fled to Germany with her new husband.