Engineer Charles C. Ervin on Engine 3 of the 11-3-1910 train was one of the pioneer hogheads on the RGS. According to the Ridgway Railroad Museum he had a 9-1-1891 seniority date, which was about as early as you could have gotten on that railroad. He was born in circa 1867.
Engineer Albert Gibbs Jr. on the 20 was mentioned earlier in the thread. BTW this engine No. 20 is not the same locomotive that is being rebuild for the Colorado Railroad Museum. That locomotive was still on the Florence & Cripple Creek in 1910.
Fireman Harry Mercer was born circa 1890. I could not find a definitive match for fireman Wanamaker.
Conductor William F. Huber was born circa 1871. Brakeman Richard ``Dick'' Murphy was born circa 1890 and later was a motorman on the Galloping Goose. His brother Tom was a bridge carpenter for the railroad.
Brakeman Fred Weller was born circa 1881. His father Joseph Weller was a conductor.