Meeting notes from bygone town, dating back more than 200 years, discovered in box
He found the books contained meeting records of a bygone town called Greenbush. The records were from 1796 to 1802.If I had time during the day to do the research about Greenbush in this era, I'd go to the NY State Library and to see the Rensselaerwyck Manor Records 1730-1899. The description talks about a series of land surveys 1785 and 1805 and says that:
Before the city of Rensselaer and towns of East and North Greenbush were formed in the mid to late 1800s, the area that encompasses them was called the town of Greenbush.
Greenbush included lands that are presently situated in the City of Rensselaer, East Greenbush, North Greenbush, and the western parts of Postenkill and Sand Lake.The oldest map I've found online is from 1893 - see it in this earlier Vintage Maps posting. By 1893, "Greenbush" refers to the southern third of what is now the City of Rensselaer (the other two thirds being "East Albany" and "Bath").
I would suggest that these meeting books should be in the NY State Library for safe-keeping, with copies made for the local historian's offices (including Rensselaer).