C. R. (Catherine Russell) Marshall (1830-1899) was born in Cortland, New York, and died in Worcester, Massachusetts. She became interested in Christian Science in 1884 when she received Christian Science treatment through prayer from Annie V. C. Leavitt, a student of Mary Baker Eddy's. Marshall took Primary (1885) and Normal (1887) class instruction with Eddy. She joined the Christian Scientist Association in June 1886. In the spring of 1888, Marshall and a group of students caused a split within the Association over its response to the Abby Corner court case. In August 1888, she was dismissed from the Christian Scientist Association.

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