/internal/media/dispatcher/774771/resize%25253Aformat%25253DthumbnailAdmiral Porter's Gunboats Passing the Red River Dam, Louisiana1864James Madison AldenSheet: 40.2 x 74.1 cm (15 13/16 x 29 3/16 in.)Watercolor and ink over graphite on paperGift of Maxim Karolik for the M. and M. Karolik Collection of American Watercolors and Drawings, 1800–187559.9270Through opening in dam left gunboat moving down river, rest of flotilla to follow.Watercolors40.200000000017402501