Civil War - The Fredericksburg and Peninsular Campaigns - Chief of Union Intelligence Allan Pinkerton, President Abraham Lincoln, and Major General McClernand; colorized photo [copy by Blackhawk Films #200-01], 1860s, GCIV 01/07, Box: GCIV 01. Civil War Collection, CIV. University of Notre Dame Archives. https://archivesspace.library.nd.edu/repositories/2/archival_objects/2092750 Accessed February 01, 2026.