Early Spencers of Virginia

Well, I haven't read the book obviously, since I can't find a copy. But it's the story of the earliest members of the Spencer family who came to America...founded Austerlitz, N.Y., also known as Spencertown. Spencers have been here since the early 1600's and Rigby's research tries to follow the descendants of the 4 Spencer Bros. Wm Spencer arrived on the Susan Constant. The 4 Brothers came from England. So basically this is a genealogy source for those of us doing research on our Spencer line here and in England, Scotland and Ireland.