Roger Bacon, Chewing the Fat?

Does this story sound familiar to anyone outside of The Face in the Frost? We're wondering if this may be another legend surrounding Roger Bacon (like the brazen head story) Bellairs borrowed and gave his own twist.

"I once had to put to rest the ghost of an old woman who was haunting a village south of here. She had been a witch, and her power to return came from a little wooden charm she had hidden under the floor of her house. I found it and decided to burn it in the town square—with the proper ceremonies, of course. When I set fire to the amulet, she appeared and rushed at me with her arms raised. She had long hooked nails and looked as though she wanted to scratch my eyes out. [18]"

We realize this may be nothing more than the sort of thing you tell around a campfire but we thought we would ask all the same.