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By the mid-1950s, the Chambord was co-owned by Henry Margolis, a New York entrepreneur and theatrical producer, and his partner Phil Rosen, who ran the restaurant on a daily basis. Margolis was often seen there entertaining theatrical friends like Orson Welles, Joseph Cotten, Margaret Sullavan and Martin Gabel.
- Markets and Menus, The New Yorker, March 30, 1957, p. 106. Describes the Chambord's new frozen food line.
- Chambord at Cote Basque Is Closed, The New York Times, August 13, 1964, p. 19. "Le Cafe Chambord at La Côte Basque, one of the most elegant restaurants in Manhattan, has closed its doors."