Statistics for occurrence #1 of “Dr. Caspar Wistar” in chapter 12 of Elias Nason, The Life and Times of Charles Sumner: His Boyhood, Education and Public Career.:

...d liberty will be secured forever. Mr. Sumner went to Philadelphia July 9, and thence to Cape May for the benefit of the sea-breeze; but, continuing very feeble, he was advised by his physician, Dr. Caspar Wistar , to repair to Cresson on the Alleghany Mountains, in Pennsylvania, where he arrived on the 3d of August, and resided in the family, and had the medical advice, of Dr. R. M. Jackson. In the beginnin...
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