I almost get a creepy feeling that they will all walk through that window… b. Whom is the speaker addressing? Who is being referred to here?

Before Mrs. Sappleton arrived to greet the visitor, Vera had prepared Framton Nuttle to believe that her aunt was insane.

"Poor aunt always thinks that they will come back someday, they and the little brown spaniel that was lost with them, and walk in at that window just as they used to do....Do you know, sometimes on still, quiet evenings like this, I almost get a creepy feeling that they will all walk in through that window - "

Vera's aunt expects the three hunters to come back, as they have only been gone for their day's of hunting. Now Mr.Nuttle believes they have been gone for three whole years.

These lines are spoken by Vera, a 15 year old girl.these lines are being addressed to Mr Framton Nuttel who is there for his nerve cure and these lines are refferring to Mr Sappleton, ronnie ,the otheer younger brother and their canine companion, the brown spaniel