Ella Peck Sweet (b. Peck) (1838-1919) was born in Ohio and died in Denver, Colorado. By 1850 she had moved with her family to Pike County, Illinois, where she married John L. Sweet, a merchant, in 1857. After marriage they resided in Barry Township, Illinois. In 1881 they moved to Park County, Colorado, and Sweet's husband went into the cattle business. He retired in 1900, whereupon they moved to Denver. In 1885 Sweet was introduced to Christian Science and experienced healing of several longstanding ailments through reading Science and Health with Key to the Scriptures. Later that year she studied Christian Science with Bradford Sherman, one of Mary Baker Eddy's students, and in October 1887 Sweet herself took Eddy's Normal class at the Massachusetts Metaphysical College and subsequently joined the Christian Scientist Association. Sweet returned to Colorado and became active in teaching and healing work in several locations, including Colorado Springs, Cañon City, Salida, Buffalo Springs, and Denver. Sweet and her daughter Clara Sweet Brady (b. Sweet) joined The First Church of Christ, Scientist, in Boston, Massachusetts, on December 31, 1892. Sweet's husband joined on June 3, 1899, and another daughter, Lilla Sweet League (b. Sweet) joined on March 31, 1894. Sweet was listed as a practitioner and teacher in The Christian Science Journal from 1890 until her passing, and Clara was also listed as a practitioner for most of her adult life. Sweet became a member of the General Association of Teachers in 1903 and worked in Eddy's Pleasant View household for several months in 1904. She also served on the board of directors of First Church of Christ, Scientist, Denver, in the early 1900s.

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