Civil War - Confederate caisson and eight horses destroyed by a 32 pound shell from the 2nd Massachusetts siege gun, Mayre's Heights, Fredericksburg, Virginia; colorized photo by Matthew Brady from the National Archives [copy by Blackhawk Films #30-02], 1863/0503, GCIV 01/01, Box: GCIV 01. Civil War Collection, CIV. University of Notre Dame Archives. https://archivesspace.library.nd.edu/repositories/2/archival_objects/2092639 Accessed December 28, 2025.