Seeking Greenes, St. Albans-Swanton Vermont, early 1800s

I am seeking specifically the parentage of Clarissa L. (Louisa) Greene, born 1829, who married Lyman Camfield in 1852 in Swanton, Vermont.

Notes on any possible related Greenes of the late 1700s or early 1800s in the St. Albans area who might be related also would be appreciated.

Lyman Camfield married, first, Olive Green, daughter of Caleb Greene, who was born in 1808. However, there is no evidence that she was an older sister, or cousin of Clarissa (Louisa). The slight possibility does still exist that Louisa was a niece of of Olive's father, via one of his step-brothers (Job Jr., Nathan).