He must go back into the house.

It will be madness to absent himself.

And, after all, is not the whole thing madness?
What is this girl to him?
A mere name; nothing more.
He mounts the steps leading to the conservatory, and, meeting Minnie Hescott, asks her to dance.
"This is only a supper dance," says she.

"I'm engaged for all the rest.

But, if you like, I'll take one turn with you.