The NKP didn't have any 2-10-4's, but I'm sure I can find an excuse for a visit from some C&O T1's. And somewhere I have a photo of an ATSF 2-10-4 on Pennsy rails in Bellevue, with the NKP tracks right next door.
John C.
Pages 114-115 in Nickel Plate Color Photography of Willis McCaleb has both 2-10-4s in Bellevue featured.
And if any BLI reps are reading this, please do the PRR J1s first, I believe in you and you have the power!