Very cool, thanks!
There are some recently scanned, and very interesting, photos that have been added to the fantastic John W. Barriger III collection at Flickr.
The A. C. F. album alone is a gold mine of period rolling stock photographs worth hours of exploration!
https://www.flickr.com/photos/barrigerlibrary/albums/72157649155982802
For example, here's a neat flat car load:
Here is a link to the home page:
https://www.flickr.com/photos/barrigerlibrary/
I thought I'd pass on the link for those who have not had the pleasure...
Ed