Statistics for occurrence #1 of “Lieutenant P. H. O'Rorke” in chapter 1 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War: Volume 2.:

...t,--one at Venus Point, on Jones Island, on the north bank of the Savannah River, and the other on Bird Island, nearly opposite. This latter point had been fixed upon after a reconnoissance made by Lieutenant P. H. O'Rorke , of the Engineers, who, with Major Oliver T. Beard, of the 48th New York, had gone in a small boat up the river as far as the west end of Elba Island, within two miles of Fort Jackson. In addition,...
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