Sphinx Head Rock with Denver, Northwestern & Pacific engine Number 100 (one hundred) emerging from Tunnel Number Thirty; elk horns placed on oil headlight by engineer Billy Rush to distinguish his engine; standard gauge track passing over former...
Sphinx Head Rock (Colo.)--1900-1910.; Railroad locomotives--Colorado--1900-1910.; Trestles--Colorado--1900-1910.; Tunnels--Colorado--1900-1910.; Denver, Northwestern and Pacific Railway.
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