Statistics for occurrence #1 of “Dr. Piper” in chapter 9 of Horace Greeley, The American Conflict: A History of the Great Rebellion in the United States of America, 1860-65: its Causes, Incidents, and Results: Intended to exhibit especially its moral and political phases with the drift and progress of American opinion respecting human slavery from 1776 to the close of the War for the Union. Volume II.:

...ments, aided by Kimball's brigade on the right, easily repulsed it. Next, a charge was made directly on Richardson's front, which was defeated as before, and our line still farther advanced as far as Dr. Piper 's house, very near to Sharpsburg, and about the center of the Rebel army at the beginning of the battle. Here artillery was brought up — this division having thus far fought without it &mdash...
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