Civil War - Charleston and Fort Sumter - Portrait of Admiral John A.B. Dahlgren, commander of the South Atlantic Squadron blockading Charleston and other Southern coastal cities; colorized photo [copy by Blackhawk Films #156-04], 1860s, GCIV 01/05, Box: GCIV 01. Civil War Collection, CIV. University of Notre Dame Archives. https://archivesspace.library.nd.edu/repositories/2/archival_objects/2092721 Accessed January 27, 2026.