Statistics for occurrence #1 of “Sangamon river” in chapter 5 of William H. Herndon, Jesse William Weik, Herndon's Lincoln: The True Story of a Great Life, Etiam in minimis major, The History and Personal Recollections of Abraham Lincoln by William H. Herndon, for twenty years his friend and Jesse William Weik:

...antagonist twice with comparative ease, and thereby demonstrated such marked strength and agility as to render him forever popular with the boys of that neighborhood. In August the waters of the Sangamon river washed Lincoln in to New Salem. This once sprightly and thriving village is no longer in existence. Not a building, scarcely a stone, is left to mark the place where it once stood. To reach it...
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