I didn't mean to include ACL in the third journey, Petersberg was and is on the N&W, now NS, east-west main line. So is Lynchberg. It was the N&W station, and I thought I said so. The tricky part of the question is use of the Southern between Lynchburg and Washington. Which station you used depended on which Southern train you took. If you took one that came off the N&W, like the Pelican or the Tennesean, you used the N&W station. If you used the Cresdent or the Piedmont or the Southener, you used the Southern Station.
If the C&O served Lynchberg with the James River main frieght line with passenger service, then that would be the train you arer looking for in the second question. But the three thorugh trains with Pullmans etc., the George Washingnton, the Sportsman, and the Fast Flyinig Virginian did not in my memory serve Lynchberg. At least not directly. If the C&O did serve Lynchberg, I presume it used its own station, but this is only a guess.