That example makes me wonder....were there any other similar "stillborn" trains that were proposed, but never ran in that era? And that at least made it into the timetable?
Hiawatha extension to Fond du Lac, WI, I believe was in the same timetable.
I'm also told that splitting the LSL into separate NYP and BOS trains (all the way from Chicago) made it as far as being in Arrow with passengers ticketed before being pulled (don't know what year that was, though).
I want to say there was at least one more, but there were also a few very-short-lived trains in that period that I could just be confusing it with one of them.