Sarah Churchill was a leading court figure under Queen Anne and wife of John Churchill, 1st Duke of Marlborough. She held a documented leasehold interest in Agney in 1728 through a counterpart lease from the Dean and Chapter of Canterbury.

Her Agney interest should be classified as leasehold unless the original lease proves a different legal status.

Research sources:
- Canterbury Cathedral Archives, U63/64614, Counterpart lease to the Duchess of Marlborough, 1728, as cited in the published study of the Thornhurst and Temple families. — https://kar.kent.ac.uk/106479/1/198matthews2024marfinal.pdf
- Wikipedia biographical reference — https://en.wikipedia.org/wiki/Sarah_Churchill,_Duchess_of_Marlborough