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In page Rebecca Rush:

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Rebecca's father was the jurist Jacob Rush.[1][2] Her mother was Mary "Polly" Rench who married Jacob Rush on November 17, 1777 in Pennsylvania, while avoiding the British Army which had occupied Philadelphia. "Miss Polly" had been a portrait painter, specializing in miniatures before her marriage, and in turn, Charles Willson Peale painted her portrait in 1786.[citation needed]