Statistics for occurrence #1 of “Grierson” in chapter 5 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 4: The Cavalry:

...ere a small body of cavalry interfered with the movements of a much larger force. It was Van Dorn, the Confederate cavalryman, who had upset Grant's calculations four months before. Meanwhile Grierson had continued his raid with less than one thousand horsemen, breaking the Southern Mississippi, and the New Orleans, Jackson, and Great Northern railroads. Near Newton the raiders burned several br...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
B. H. Grierson 256 46 12 2 0 user votes
Grierson 588 0 66 0 0 user votes
Benjamin H. Grierson 26 0 6 0 0 user votes
Benjamin Henry Grierson 18 0 0 0 0 user votes
H. B. Grierson 17 0 1 0 0 user votes
B. F. Grierson 5 0 1 0 0 user votes
Samuel Grierson 4 0 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.