Thanks for your reply. The reference I quoted comes from an unfinished/unpublished book by Lucius E. Allen, entitled "Descendants of Ethan Allen and related families of America." I am currently transcribing the book and should be finished very soon.
My Allen ancestry has been established back to the subject of the book, Ethan Allen b. ca. 1755 in Litchfield, CT,died about 1786-1789 in VT. He and Susan Barber had four children: Susan, Ethan II, John and Barber. We have not been able to find any further information on the ancestry of Ethan Allen I. I was hoping the connection between Barber Allen and Amasa and Issachar Allen may provide some clues.