There are a number of new photos on Shorpy worth checking out. A companion of the one here from a different angle is next to this one, click on "Railroads" in the list on the right of the photo from the link. Shows an interesting movable louvered vent on the end of a car, perhaps the ACL car
Isn't that the car laying on its side between the ACL and GM&N car in the 1st photo? It also appears to be an ACL car and shows the dark on light paint ACL monogram.
