Statistics for occurrence #1 of “Haupt” in chapter 14 of The Photographic History of The Civil War: in ten volumes, Thousands of Scenes Photographed 1861-65, with Text by many Special Authorities, Volume 5: Forts and Artillery.:

... had been erected. It was completed on May 13th. After President Lincoln first saw this bridge he remarked: I have seen the most remarkable structure that human eyes ever rested upon. That man, Haupt , has built a bridge across Potomac Creek, about four hundred feet long and nearly a hundred feet high, over which loaded trains are running every hour, and, upon my word, . . . there is nothing in it...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Herman Haupt 69 58 5 2 0 user votes
H. Haupt 31 0 1 0 0 user votes
Haupt 21 0 11 0 0 user votes
Lewis M. Haupt 5 0 1 0 0 user votes
Paul Haupt 4 0 0 0 0 user votes
Elizabeth Haupt 2 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.