1. 6015. Tunnels 12 and 13. Colo. Midland Creator: Jackson, William Henry, 1843-1942 Published / Created: ca. 1879-1894 Call Number: WA Photos 10 Collection Title: Photographs of Colorado Container / Volume: Box 1 Image Count: 2 Found in: Beinecke Rare Book and Manuscript Library > 6015. Tunnels 12 and 13. Colo. Midland