Marjorie Colles (c. 1848-1915) was born in Guernsey, Channel Islands, and died in an unknown location. Colles married Graves Colles in 1879. They lived in Dublin, Ireland, when they first became interested in Christian Science through reading Science and Health with Key to the Scriptures in 1887. Marjorie and Graves Colles became students of Mary Baker Eddy's, both completing the Primary class together in March 1888 (Marjorie would also complete Eddy's last Normal class in November 1898). Afterwards, they returned to their home, Mount Eagle, in Killiney, a few miles outside of Dublin, and Colles worked as a practitioner. The first privately held Christian Science services in the United Kingdom were conducted by Colles and Anne Dodge, who was also a student of Eddy's, in London, England, in the fall of 1890. Colles joined The First Church of Christ, Scientist, in Boston, Massachusetts, on July 1, 1893, and in doing so was the first inhabitant of Ireland to become a member of The Mother Church. In the mid-1890s, Colles moved to Monmouthshire, Wales, and later to London. In 1897, a Jewish synagogue at Bryanston Street in London was secured through a generous gift from Colles to become the first Christian Science church in Europe. Together with E. Blanche Ward and Julia Field-King, Colles helped establish First Church of Christ, Scientist, London, and laid the cornerstone in 1904. In 1904 and 1905, Colles served as chairman of the General Association of Teachers in London. Colles was listed in the directory of The Christian Science Journal as a Christian Science practitioner and teacher in Dublin in 1894 and in London in 1905. Colles moved to South Africa soon after the outbreak of World War I in 1914 and never returned to England.

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