Alvin B. Cross (1858-1936) was born in Wilmot, New Hampshire, and died in Concord, New Hampshire. He worked as a teacher and was elected superintendent of schools in Wilmot, New Hampshire, at the age of 21. He married Elizabeth M. Cross (b. Gage) in 1882, and they moved to Concord. In Concord, he became the assistant cashier of the National State Capital Bank, where he remained until 1894 when he resigned to become a representative of the banking firm A. B. Leach & Co. Cross was involved in local politics, serving as Concord's city treasurer from 1902 to 1903 before serving in the New Hampshire House of Representatives from 1908 to 1910 and the New Hampshire Senate from 1911 to 1912. He also served in civic organizations, as clerk of the Margaret Pillsbury General Hospital; director and president of the Concord Building & Loan Association; and treasurer of the South Congregational Church. Cross was a Freemason. The Crosses were both members of the South Congregational church of Concord, although Elizabeth later became a member of The First Church of Christ, Scientist, in Boston, Massachusetts, in 1907 and remained so until her death. Cross served as auditor of the trust fund of First Church of Christ, Scientist, Concord, New Hampshire. As a banker, he helped Mary Baker Eddy with real estate issues and also helped resolve issues with the city of Concord. Considered a friend by Eddy, Cross served as a witness to Eddy's original will.

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