From the KLVX Steamboats on the Colorado Photograph Collection (PH-00156). Written on photo sleeve: "Salt mine. (Colorado River area)." Handwritten on verso: "Courtesy Special Collections UNLV."
Noonday Mine (Tecopa Consolidated Mining Co.) 9 miles E. of Tecopa, California on T.R.R.. The stamp on the back of the photo reads: "Mallory Hope Ferrell P. O. Box 2837 Peachtree City, GA 30269."