Harriette D. Walker (1841-1916) was born in Leominster, Massachusetts, and died in Ayer, Massachusetts. For over 25 years she was a national evangelist for the Women's Christian Temperance Union (WCTU) and she also served as the corresponding secretary for the Massachusetts and Rhode Island chapters. In 1885, she became interested in Christian Science after receiving Christian Science treatment through prayer from Sarah H. Crosse, a student of Mary Baker Eddy's. Later that year, Walker intended to study at the Massachusetts Metaphysical College but was unable to do so because the dates of the class clashed with the dates of the National WCTU Convention. Walker's association with Christian Science ended soon after that. In 1901 she became the religious instructor at the Young Women's Christian Association in Boston, a position she held until her passing.

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