Many of you have probably seen this already but I happened to stumble upon it while watching videos posted on the 'What do you pull behind your Hudson?' thread.
Excellent color footage of the steamers that ran along the 'billiard-flat' Water Level Route. Aside from many Hudsons, the narrator mentioned that "the Niagara was the most advanced steam locomotive ever produced" and "with roller bearings that 2 men could push it along with the massive centipede tender". That's an amazing statement and better than the N&W J Class which supposedly 5 or 6 men could push on level track. I had believed that the J was the most advanced steamer built but perhaps I have been enlightened? :-)
Enjoy
https://www.youtube.com/watch?v=DLUd-BabLlc