Re: Sumpter Question #1

I am at the library so can not get to my notes, so this is off of the top of my head. Most of the box cars that I have seen in the photos were built by the Union Pacific shops / Omaha or Eagle Rock. Contrary to the claim in the book Rails, Sagebrush & Pine, none of the cars came from the South Park, although their box cars did resemble some of the South Park 27 foot box cars. Arched end fascias, and the corner poling pockets were standard for the UP shops 1880's. I can see the same details on the Colorado Central box cars built in 1880.
As to the Ohio Falls cars, I think that I have only spotted one in the above book, it has a straight end fascia. There could be more as the
U&N rebuilt a number, maybe most of the Ohio Falls flat cars into box cars. They have the arched end fascia and corner poling pockets.