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Mrs. Archer and her son and daughter, like every one else in New York, knew who these privileged beings were: the Dagonets of Washington Square, who came of an old English county family allied with the Pitts and Foxes; the Lannings, who had intermarried with the descendants of Count de Grasse, and the van der Luydens, direct descendants of the first Dutch governor of Manhattan, and related by pre-revolutionary marriages to several members of the French and British aristocracy.