Statistics for occurrence #1 of “Heintzelman” in page 380 of Benson J. Lossing, Pictorial Field Book of the Civil War. Volume 2.:

...
that way for the advance of the National forces, and form a connection with Heintzelman 's corps. Hooker was sorely pressed. The Confederates were heavily massed in front of Patterson and his supports. At half-past 11 o'clock he sent a note to Heintzelman, asking immediate assist...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Samuel P. Heintzelman 366 80 12 0 0 user votes
Heintzelman 854 0 138 0 0 user votes
S. P. Heintzelman 835 0 21 0 0 user votes
S. V. Heintzelman 120 0 0 0 0 user votes
Mary L. Heintzelman 18 0 0 0 0 user votes
Rush B. Heintzelman 8 0 0 0 0 user votes
Samuel Peter Heintzelman 8 0 2 0 0 user votes
Mish T. Heintzelman 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.