Did Robert Lincoln Ride the Funeral Train to Baltimore?

[LincolnToddFan]

It puzzles me that no one from AL's birth family came to Washington for the funeral nor were any of the Hanks in Springfield for the burial. Of course I understand about Lincoln's much loved but aged stepmother Sarah. But what about Dennis or the others? I don't get the impression he was ever shy about the spotlight and he was certainly very willing to chat up his famous kinsman after his death.

What happened? I know that AL supported them financially. Did they simply not have enough money to make the trip?