[Man observing from wooden walkway in deep narrow rocky gorge : stereo photonegative,] 1904.
[Railroad line through mountainous area : stereo photonegative], 1904.
[Low view of river and valley in rocky mountain area : stereo photonegative,] 1904.
[Low view of valley in rocky mountain area.] Stereo photonegative, 1904.
Looking from Capitol, N.N.W. over Denver to the mountains. 10612 Interpositive 1910
"Major Duomo" Rock, Glen Eyrie. [Active no. 12364: Stereo Interpositive].
June 28th Pledge Day for War Savings / Uncle Sam to Colorado "You've Never Failed Me Yet!"
Oral history interview with Harold O'Connor, 2007 October 11-31, Transcript