Statistics for occurrence #1 of “Round Top” in chapter 22 of John D. Billings, Hardtack and Coffee: The Unwritten Story of Army Life:

... article in the Century Magazine for January, 1887, describing Pickett's charge, says that he was particularly cautioned, in moving the artillery, to keep it out of sight of the signal-station upon Round Top . In a foot-note referring to this caution he says:-- This suggests the remark that I have never understood why the enemy abandoned the use of military balloons early in 1863, after having use...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Round Top 824 6 0 0 0 user votes
Little Round Top 290 1 290 1 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.