Mary C. Metcalf (b. Roulstone) (1836-1913) was born in New York, New York, and died in Marblehead, Massachusetts. She married Albert Metcalf in Roxbury, Massachusetts, in 1860. In 1865 they were living in Boston, Massachusetts, and by 1890 they were residing in Newton, Massachusetts, where they spent the remainder of their lives. Mary Metcalf was healed through Christian Science treatment, and when the Original Edifice of The First Church of Christ, Scientist, in Boston, Massachusetts, was erected in 1894, Metcalf's husband donated the pipe organ in remembrance of her healing. The couple joined The First Church of Christ, Scientist, on January 2, 1897, and they became First Members on July 3, 1897. Their daughter, Mary M. Neal (b. Metcalf), and son-in-law, James A. Neal, were also members. The Metcalfs studied Christian Science with their sister-in-law, Alma S. Metcalf, a student of Mary Baker Eddy. They also became students of Eddy, completing the Normal class in November 1898 and continued to correspond with her often throughout their lives. They were members of the General Association of Teachers, and Albert served as president of The First Church of Christ, Scientist, from October 1898 to May 1899.

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