After I posted, I think I did find them in 1910, with their name mis-transcribed - the original is very faded, and I think Ancestry has them as Blough.
I found this on Heritage Quest
Hartland, Windsor County, Vermont
William Clough, age ?, born Vermont, parents born Vermont
Elizabeth J. Clough, married 2 years, has one child
Agnes Clough, daughter, age 1
The index has his age as 38, but it doesn't look like that to me, it is really not legible. Also, I can't read his occupation.