Peabody was born in New York and educated at the
Girls' Latin School,
Boston, and at
Radcliffe College. She also participated in
George Pierce Baker's Harvard Workshop 47. In 1898, she was introduced to fifteen-year-old
Khalil Gibran by
Fred Holland Day, the American photographer and co-founder of the Copeland-Day publishing house, at an art exhibition. Shortly thereafter Gibran returned to Lebanon but the pair continued to correspond. From 1901 to 1903, she was instructor in
English at
Wellesley. The Stratford-on-Avon prize went to her in 1909 for her drama
The Piper, which was produced in
England in 1910; and in America at the
New Theatre,
New York City, in 1911. Composer
Grace Chadbourne used Peabody's text for her songs "Green Singing Book" and "Window Pane Songs". On June 21, 1906 she married
Lionel Simeon Marks, a British engineer and professor at
Harvard University. They had a daughter, Alison Peabody Marks (July 30, 1908 – April 7, 2008), and a son, Lionel Peabody Marks (February 10, 1910 - January 25, 1984). ==Selected works==