[7] He was educated at Huddard's School in New York City, entering Yale College in 1850 where he graduated four years later in 1854.
In early 1857, his elder brother Albert took him into partnership under Stevens, Angelo & Company, and they ran a sugar commission business with Cuba until 1868.
[11] In July of the 1868, he became cashier of the Gallatin National Bank of New York (which was founded by John Jacob Astor and which his grandfather had been the first president).
[15] Mary's sister, Emily Marshall Otis, was married to historian and educator Samuel Eliot.
[16] Together, Mary and Alexander were the parents of eight children, including:[7] On July 10, 1916, Stevens died of heart failure at his home in Lawrence on Long Island, where he had lived since 1874.