She was pointing to the door.

In the excited state of his sensibilities at that moment the action stung him to the quick.

He answered without his customary consideration for his aunt's age and his aunt's position toward him.
"You apparently forget, Lady Janet, that you are not speaking to one of your footmen," he said.

"There are serious reasons (of which you know nothing) for my remaining in your house a little longer.

You may rely upon my trespassing on your hospitality as short a time as possible." He turned again to Mercy as he said those words, and surprised her timidly looking up at him.