D. Scott Chatfield
I've enjoyed the info as well. This is probably the one Southern mainline I know the least about. I don't recall ever seeing an article about it in the railfan press (Trains, R&R, CTC Board, etc).
I drove along the line from Mt. Vernon to Louisville last year on a rainy Sunday. Only saw one intermodal train. The engine shed at Huntingburg is still there. Most of the line is very tree'd in so it would be easy to miss a train. And southern Indiana is quite hilly so the line is quite curvy. West of Princeton it's rather flat with lots of long tangents.
I was surprised to find a small grain elevator at Golden Gate, Illinois which had a single grain hopper spotted. I gather they ship single carloads to packagers of bird seed.
Hopefully I can make another drive along that line in better weather and catch more trains.