Merrill, Robert H., 1881-1955, “Joanna Sprague stone, Pleasant St. Cem. Stoneham,” Digital Collections, accessed December 11, 2025, https://digitalcollections.library.gvsu.edu/document/49677.
Black and white photograph of the gravestone of Joanna Sprague which reads, "Here lyes y Body of Mrs. Joanna Sprague Wife to Mr. Samuel Sprague Who Died June 17th 1739 Aged 43 Years & 3 Months."