Arrival in the British Mission of Amanda Inez Knight and Lucy Jane Brimhall, the first unmarried women to serve as full-time missionaries. Previously lady missionaries were married women who were set apart as companions to their husbands, usually mission presidents. On 16 Mar. George Q. Cannon had said that through the missionary service of unmarried young women, "some kind of solution would be found to the problem so often discussed, 'What shall we do with our girls?'"
[Source: The Mormon Hierarchy - Extensions of Power by D. Michael Quinn, [New Mormon History database ( http://bit.ly/NMHdatabase )]]