1. The Colorado River at the upper, or ""Line mesa"" Creator: MacDougal, D.T Published / Created: undated Call Number: WA Photos 271 Collection Title: Frederick Samuel Dellenbaugh collection of photographs and drawings of the Colorado River region. Container / Volume: Box 3 | Folder 103 Image Count: 2 Resource Type: Prints & Photographs Found in: Beinecke Rare Book and Manuscript Library > The Colorado River at the upper, or ""Line mesa""