 They also designed the Arnold Arboretum headquarters, the Hunnewell Building, in 1892 which was constructed with funds donated by philanthropist-horticulturalist in 1903.Longfellow later moved to Boston, where he worked in association with his cousin, William Pitt Preble Longfellow (1836-1913).He designed several structures around Harvard, including the Brattle Theatre, the Phillips Brooks House, the Semitic Museum, the Bertram and Eliot Halls at Radcliffe College, and chemical laboratories.