Flora B. Weeks (1905 -2002) of Clarendon who was the Vermont State Historian, Daughters of the American Revolution, wrote a historical summary of Clarendon's first 200 years in 1961. It is remarkably detailed and is an excellent resource for researchers. Flora also prepared the tour document seen below. That document is courtesy of Ed Congdon.
The text of the historical summary written by Flora can be found here.