Mount of the Holy Cross in the background with the plaque marking the boulder where William H. Jackson photographed his son, Clarence, and George Beam in 1893. That famous photo is part of the Western History Collection of the Denver Public Library [DPL WHJ-10213]. The plaque reads: "Clarence Jackson was photographed on this boulder in 1893 by his father WILLIAM H. JACKSON, who took the very first picture of the cross on August 23, 1873. This...