Are we possibly distant cousins?
I just found Samuel's buriel place a few minutes ago on The Waupaca Co. cemetery site. He is listed alone, so maybe Elizabeth returned to Lisbon, St. Lawrence, NY or remarried for the 3rd time. He is in the Lakeside Memorial Park, section 30, Lot # 276-0, space #1, Waupaca Township, Waupaca, WI. His birth is listed as 1801 and death as 1881 age 80.
His daughter Rebekah Fulton-Northrup is my GG Grandmother.
Good luck with your search,