When did Thomas Willis - Clerk of the Crown in Chancery die?

While there is a notable figure named Thomas Willis who was a physician and scientist, there is no record of a "Clerk of the Crown in Chancery" named Thomas Willis.

Clerk of the Crown in Chancery is a historical office in the English legal system. The office was responsible for recording and maintaining official documents relating to the Crown, including royal decrees, patents, and other legal instruments.

It is possible that there was a Clerk of the Crown in Chancery named Thomas Willis, but there is no known record of his existence. Please clarify your question if you have more information.