I believe I do have a timeline of events that you might find educational.
By waiting silently in a room with him, Deborah works out that her grandfather, Walter, is blind.
He admits that he has been blind since the war, but never brings it up. Deborah questions how he manages, to which Walter says that his wife, Vanessa, is a great help to him.
As if to demonstrate, Vanessa enters the room at that moment. She says:
“Ah, Walter. There you are. Oh, and Deborah too. You look very cosy over there, dear, in that window seat.”
Vanessa uses indirect comments like this to help Walter place people and objects in the room.