Clarendon was claimed three times in the 1700's. The link above brings you to a narrative from the 1976 Clarendon History book about those claims and about the confiscation of properties owned by Tories following the Revolutionary War.
The gray area on the map to the east of Lake Champlain is the Lydius Grant which is the first grant claiming what is now Clarendon. It ran approx. 24 miles to either side of Otter Creek. The northern portion of modern day Clarendon was part of Socialboro in the Lydius Grant and the remainder of town was part of Durham.