American writer and editor who was largely responsible for editing the first posthumously published editions of the poems of Emily Dickinson (Dickinson, Emily).

Mabel Loomis graduated from Georgetown Seminary in Washington, D.C., and then studied at the New England Conservatory of Music in Boston. In 1879 she married David P. Todd, an astronomer who in 1881 joined the faculty of Amherst (Massachusetts) College. In Amherst she became a close friend of the Dickinson family; she corresponded with the reclusive poet Emily Dickinson (Dickinson, Emily) but never met her in person. She was deeply impressed by a few of Dickinson's poems, and when the poet died in May 1886 and several hundred poems were found neatly bundled away, the family asked Mabel Todd to prepare them for publication.

After nearly two years of painstaking work she was joined by Thomas W.S. Higginson (Higginson, Thomas Wentworth), who had also had a long correspondence with Dickinson and had felt that her poems were so original that they were nearly unpublishable. He and Todd undertook to polish and “correct” several of the poems chosen for publication. A volume of Poems by Emily Dickinson appeared in 1890 and was followed by a second volume in 1891. By herself Todd prepared a third volume, published in 1896. She also published two volumes of Letters of Emily Dickinson in 1894.

Todd's own writing included Footprints (1883), a novel; Total Eclipses of the Sun (1894), long a popular treatment; Corona and Coronet (1898), based on a trip to Japan (one of many trips with her husband to observe eclipses); A Cycle of Sunsets (1910); and Tripoli the Mysterious (1912). She also wrote numerous articles on nature and conservation and was active in the Audubon Society.