Did Robert Lincoln Ride the Funeral Train to Baltimore?

[L Verge]

"He came just before departure and was seated in the last car alongside his friends, the two private secretaries. Nicolay and Hay both had made the inaugural journey but now would proceed only to Baltimore from where they would return to Washington, and, with Robert, help clear the way for the incoming executive. Judge David Davis would return with them."

To me, that portion is awkwardly worded. I don't know whether Robert continued with his father's train, or if he, Nicolay, Hay, and Davis all went back to D.C. To me, those few sentences could be interpreted either way