See this image I just crafted in Paint.
The red track is PRR, running over a trestle at a significant height above the NYC tracks below in blue. The blue follows the two bridges I described in an earlier post, the further east bridge still in use as a pedestrian bridge, the west bridge totally abandoned but with the track still in place. I have drawn a question mark near a building on the north side of the outlet that I have always wondered about its connection to the rail service that ran by, as this is where the second bridge carried the NYC track that either terminated at this building or continued on to the edge of the lake on the north side. The other spur in blue ran along the south side to the current location of the Carey's rental facility.
The yellow track would have been a spur to serve Birkett Mills.
The Green is the only possible alignment that could have existed for a connector between the PRR and NYC, especially as late as 1950's. I just wonder how it worked given the steep grade it would have had to travel. I added another green line that ran out to the east away from Birkett Mills. Given the location of homes etc. this line seems more like a feasible connector, but would have run away from Birkett Mills, which doesn't match the rearly descriptions of how the tracks connected.
Thoughts?
Brooks