"Or you, Tom ?" to a tall young man who has followed in her quick little progress across the room.
He is her cousin, Tom Hescott.

He is so very much taller than she is, that she has to look up at him--the top of her head coming barely to a level with his shoulder.

She smiles as she asks her question, and the cousin smiles back at her.

It suddenly occurs to Sir Maurice, who has strolled into the room (and in answer to a glance from Mrs.Bethune is going to where she stands), that Tom Hescott is extraordinarily handsome.
And not handsome in any common way, either.

If his father had been a duke, he could not have shown more breeding in look and gesture and voice.