Rochester VT has Abagail Dau of Silas & Nabby died 22 Feb 1875 age 67/68.
I doubt if Andrew I was ever in VT as Hezidiah(Fairbanks/Moore) had property in Bolton given by her father, Andrew l probate records and property listing is in the County Court house in Worcester MA. Therefore the adoption would have been by Andrewl l while he was in Putney between the time he was found and his marriage in Putney in 1791. I only know of the one house which I believe came from a Fairbanks parcel so there could have been more of them as they were all family.
Andrew ll was in Putney Rochester Ripton and Woodstock as stated in his personal statement for his pension application. His property in Rochester is well documented in the History of Rochester VT and there is a stone monument to him with a brass plaque from his sons who moved to California.