Thanks to Sherry Wilson for posting a picture of Mrs. Mary A. Curtis' gravestone on www.findagrave.com memorial number 39500138. This gave me additional information about Mary A. Curtis. She was buried in Hough Cemetery in Almont, Lapeer, Michigan.
Born 13 Jan 1823 maiden name Strong
Died 14 Mar 1881
Married Eben S. Curtis(s).
Eben S. Curtis
Born 22 May 1820
Died 02 May 1898
From Eben's second marriage record to Julia Wells nee Van Cleek on Feb 26, 1884, his place of birth is listed as Genesse County, New York. See Michigan Marriages 1868-1925 on Familysearch.org.
Interestingly, three records down is the marriage of Joseph Russell and Carrie [Cora] Wilbur on April 9, 1884. Eben and Mary Curtis had a son, Linus Curtis who married Rena Wilbur, sister of Cora Wilbur. After Cora died, Linus and Rena adopted one of Cora's daughter's, Sadie Russell.