The Brewsters were remarkable in numbering among their circle of friends many prominent artistic, literary and political figures, including D.H. Lawrence and Willa Cather, both of whose writings they influenced, Elihu Vedder, Vachel Lindsay and three generations of the Nehru family.
In 2008, the Smithsonian American Art Museum organized an exhibition of Vedder's Rubaiyat illustrations that toured several museums, including the Phoenix Art Museum.
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Finally, he completed his studies in Italy - where he was strongly influenced not only by Italian Renaissance work but also by the modern Macchiaioli painters and the living Italian landscape.
Among those who worked with him were the sculptor Karl Bitter and the painter Elihu Vedder.
Elihu Yale | Elihu Vedder | Elihu Root | Elihu Thomson | Elihu Burritt | Elihu Harris | Richard Elihu Sloan | Ralph Elihu Becker | Elihu Lauterpacht | Elihu Katz | Elihu B. Washburne |
He returned to Europe in 1866 with fellow painters William Morris Hunt and Elihu Vedder.
He was a major inspiration to the artists known as the Macchiaioli, and also had many English and American friends and followers, notably Elihu Vedder, Matthew Ridley Corbet (1850–1902) and his wife Edith Corbet, and Lord Carlisle, and was closely associated with Corot and the Barbizon school, whom he met while visiting Paris.
In 1904, he was a guest of American novelist Francis Marion Crawford in Rome, where he became acquainted with Italian sculptor Gaetano Chiaromonte and American artist Elihu Vedder among others, and filled several sketchbooks with drawings of local scenes.