There is a great Felt Genealogy, "The Felt Genealogy: A Record of the Descendants of George Felt of Casco Bay" compiled by John E. Morris in 1893. This book will tell you about everything known about George Felt and will list many lines of descent from him. Your line will in all likelihood be there at least to some extent. This book is found is the genealogy sections of many libraries. You can order a reprint from higginsonbooks.com. What do you know about your descent from George Felt; can you trace your line all the way back to George?