He said he would not see the train on his weekend when he is away walking.

Clear, simple. Even for someone of your limited capabilities.

The fact the same train may be running close to where he lives is irrelevant, although your knowledge of his exact whereabouts is slightly disconcerting.

PS The son of Gloin is a dwarf and not a Gnome, quite different beings

............. if they exist of course, no doubt you believe in them.

Can you not get a job in a café frying eggs or something, you MAY have a talent for that.