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

...amite cruiser Vesuvius at the bombardment of Santiago de Cuba in 1898, and larger ones have been installed at Fort Warren, Boston; Fort Schuyler, N. Y.; Fort Hancock, N. J., and at San Francisco. Graydon dynamite gun, calibre 15 ins.; using 3,000 lbs. of compressed air to the square inch; throws 600 lbs. of dynamite 3 miles. Armstrong gun, calibre 6 ins.; weight of shot, 69.7 lbs.; of powder, 34 ...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Alexander Graydon 6 6 0 0 0 user votes
James Graydon 24 0 2 0 0 user votes
Graydon 6 0 2 0 0 user votes
William Graydon 2 2 0 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.