Just like the LHR granted trackage rights to the Reading & Pennsy for through freight into NY from PA, did the LNE ever grant trackage rights to another railroad through NJ for any reason?
Not that I'm aware of. I will say about 35% of the mainline for the L&NE through "Joisey" was on NYS&W trackage (Hainesburg-Swartswood).
Take care