Lettie S. Bigelow (July 30, 1849 – March 1, 1906; pen name, Aunt Dorothy)[1] was an American poet and author of the long nineteenth century.

Increase Briggs Bigelow (1817–1901),[6] an itinerant minister, for more than half a century an honored member of the Methodist Episcopal Church.

Failing health compelled her to relinquish her course of study in that institution before the completion of the regular course, and she thereafter made her home with her parents at their various appointments.

[3] Around 1889, her father left the active work of the ministry and made for himself and family a permanent home in Holyoke, Massachusetts, with Miss Bigelow living there, too, and caring for an invalid mother.

A member of the W.C.T.U.,[7] in 1890, she became the editor of True Light, a monthly paper published in the interests of the Massachusetts W.C.T.U.,[8] of which her "Aunt Dorothy" letters formed a unique feature.