Robert B. de l'Armitage (c. 1845-1913) was born in Canada and died in Chicago, Illinois. He worked first as a clerk and then as a department manager for Chas. Gossage & Co., a dry goods store in Chicago known for having one of the largest floor areas in the country at that time. He was the second husband of Arabella M. (Root) de l'Armitage, whom he married in 1881. She was a well-known singer, composer, lyricist, poet, and international philanthropist. She was the founder of the Drexel Boulevard Old Men's Social Club and a member of the Women's Relief Club and the Progressive Health Club. She was invited to sing before both the Duke of Edinburgh and the Shah of Persia. In June 1886 de l'Armitage wrote a letter to Mary Baker Eddy on behalf of himself and his wife inquiring about books she recommended to those new to Christian Science, and at another time he ordered a copy of Mind-Healing: Historical Sketch. Based on the records available, we have found no further information concerning his involvement with Christian Science.

See more letters.