Statistics for occurrence #1 of “Sickles” in part 2.11, chapter 2.12 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 2: Two Years of Grim War.:

...is field, on which the advance of both armies had accidentally met, the place of a general engagement. Lee had come to the same decision, and both called on their outlying Trostle's House, Sickles ' headquarters at the beginning of the second day. The house stood some distance back from the Emmitsburg road, overlooking the Peach Orchard, from which the Confederates finally drove the sturdy men ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Daniel E. Sickles 1,087 48 35 2 0 user votes
Sickles 1,124 0 184 0 0 user votes
D. E. Sickles 349 0 7 0 0 user votes
Dan Sickles 207 0 3 0 0 user votes
Daniel Edgar Sickles 67 0 5 0 0 user votes
Daniel Sickles 27 0 5 0 0 user votes
Gen Sickles 24 0 0 0 0 user votes
D. A. Sickles 3 0 1 0 0 user votes
Damal E. Sickles 2 0 0 0 0 user votes
David B. Sickles 2 0 0 0 0 user votes
Gen Dan Sickles 2 0 0 0 0 user votes
H. F. Sickles 2 0 0 0 0 user votes
D. N. Sickles 1 0 1 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.