1783 - The Montagus marry into Wilcot
There were three different marriages between Montagus and Wroughtons in the mid 18th century.
The last of the three, that between Charlotte Wroughton and her cousin Admiral Sir George Montagu, resulted in their descendants owning Wilcot. That was because Charlotte’s only brother James died at the age of 16 without heirs:
Three Montagu Wroughton marriages