William A. Clark (1862-1956) was born in Abington, Massachusetts, and died in Miami, Florida. By 1870 he had moved to Hanover, Massachusetts, and by 1880 to Rockland, Massachusetts. He lived in Brooklyn, New York, for a brief time in the mid-1880s before returning to Rockland where he married Grace L. Clark (b. Estes) in 1893. By 1909 they had moved to Concord, New Hampshire. For the majority of his career Clark owned and operated a dry goods store. By 1920 they had moved to Plymouth, Massachusetts, where Clark became a billing clerk for a shoe factory while his wife continued to operate their dry goods store. Sometime after 1930 they retired and moved to Miami where they remained for the rest of their lives. In 1886 Clark wrote a letter to Mary Baker Eddy mentioning that he had been reading Science and Health with Key to the Scriptures and inquiring about studying Christian Science. While living in Concord he was a member of the Christian Science church there and signed a letter of gratitude to Eddy on its behalf in 1909. Clark took a class in Christian Science from Berenice H. Goodall, a student of Mary Baker Eddy. He and his wife both joined The First Church of Christ, Scientist, in Boston, Massachusetts, on January 1, 1898.

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