Vintage WP&Y and RGS films (corrections)

After sending my post, I went to watch all three videos for the first time in about a year. Some corrections are in order:
1) Most of the photography was made by Woodrow Gorman, not Carl Dudley. Dudley was involved with some other RR films.
2) The films are shot in color, not B&W. The color has shifted or was crude to begin with. That's what gave me the impression of sepia tone.
3) The third film of the trilogy, "Bustling Narrow Gauge," covers the D&RGW. It was shot between 1942 and 1945 (according to the credits). Scenes cover the line from Alamosa to Durango to Silverton. There are a few scenes at Ridgway and along the line to Crested Butte.
So three films, three ng railroads: WP&Y, RGS, and D&RGW.
The WP&Y one ends with a spectacular triple header!