Statistics for occurrence #1 of “Porterfield” in chapter 4 of Maj. Jed. Hotchkiss, Confederate Military History, a library of Confederate States Military History: Volume 3, Virginia:

...that Porterfield was able to collect at Grafton, Lee ordered 1,000 muskets and rifles to Beverly, and some from Harper's Ferry to Grafton. Soon after the election upon the ordinance of secession, Porterfield , being advised of a contemplated Federal movement against Grafton, ordered the burning of two important bridges on the branches of the Baltimore & Ohio, northwest and west of Grafton. Consideri...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
George D. Porterfield 27 27 1 1 0 user votes
Porterfield 134 0 36 0 0 user votes
G. A. Porterfield 46 0 4 0 0 user votes
George A. Porterfield 27 3 5 1 0 user votes
George Porterfield 23 0 1 0 0 user votes
Colonel Porterfield 18 0 0 0 0 user votes
Charles Porterfield 6 0 0 0 0 user votes
G. W. Porterfield 2 0 0 0 0 user votes
Geo Porterfield 2 0 2 0 0 user votes
J. Porterfield 2 0 0 0 0 user votes
S. A. Porterfield 2 0 0 0 0 user votes
Alexander Porterfield 1 0 1 0 0 user votes
William Porterfield 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.