Hasket Derby (1835-1914), was the grandson of Elias Hasket Derby, a prominent trader in Salem, MA., who was thought at one time to be the richest man in the United States. Hasket married Sarah Mason and the family lived in Boston. Dr. Hasket Derby was a renowned opthamologist and had this townhouse built in the Back Bay of Boston in 1886. He hired architect William Ralph Emerson, who ditched his prototypical Shingle style for the urban townhouse in the Colonial Revival style. The townhouse exhibits a brownstone swans neck pediment at the entry, three-story rounded bow, dentilled cornice and brick pilasters framing the bays. Its an often overlooked house in Back Bay, but so very special.