Mike,
you are correct,
I should have stated #60 started the last run to Leadville out of Denver, the #9 took over at Como, the #9 ran the last train back to Denver from Leadville.
The reason I wrote it the way I did was there was pontification on whether or not the film in question was of the train headed to or from Leadville. John Schapekahn would have said
it was something to do with shadows or such
The use of the #9 confirms it was the return trip and this was obviously at Sheridan Jct.
As to why the #60 was used?
Obviously the #9 was aready in Como, since photo's show there wasn't a double header and the #60 was wanted(for whatever reason) in Como, the "last Train" just happened to provide the vehicle to accomplish the power swap.
Recent pictures being posted on the internet of power moves of up to 5 loco's on the Southbound pasenger run taken back in the late 80's here caused some remarking re the 5 horses on a 3-car train. This was at the time to get needed power to the other end of the line since the trains that would normally have got that power down there were cancelled due to a M-o-W work window. Easier and cheaper than a light loco move.
UpSideDownC
in New Zealand