Question

what was the intention of the glum faced man to take Mr Easton to the smoker car

Answer 1

As acting as the criminal the glum faced man could not order mr easton in front of miss fairchild....... so he acted like a request to go to the smoker car and mr easton could not deny it.

He took mr easton out from there to smoker car as if they stayed any longer there was a chance that someone would recognize their true identities