www.rcplondon.ac.uk/events/scholar-courtier-magician-lost-library-john-dee
"Today the Royal College of Physicians library contains more than 100 books previously belonging to Dee: the largest known collection of Dee books surviving in one location. They were acquired as part of the library of the Marquis of Dorchester, presented to the physicians in the 1680s. It is not clear how these 100-plus volumes came to be owned by Dorchester, but there is evidence that many of them were stolen from Dee by a certain Nicholas Saunder."