Statistics for occurrence #1 of “Gatling” in entry cannon of Harper's Encyclopedia of United States History:

...n Company, 1860. Parrott gun first put to test of active warfare in the battle of Bull Run, July 21, 1861. Gatling rapid-firing gun, from five to ten barrels around one common axis; tenbarrel Gatling discharges 1,200 shots a minute; range, 3,000 yds.; invented in 1861. S. B. Dean, of South Boston Iron Company, patents a process of rough boring bronze guns and forcibly expanding the bore to it...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Richard Jordan Gatling 13 10 1 0 0 user votes
Gatling 8 0 0 0 0 user votes
Riddick Gatling 3 0 1 0 0 user votes
Jonathan Gatling 2 0 0 0 0 user votes
John Gatling 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.