I heard him let himself in and go to bed, and he told me about it in the morning.

That is how I know.
Since the day after the _debut_ Nino had not seen the baroness.

He did not speak of her, and I am sure he wished she were at the very bottom of the Tiber.

But on the morning after the serenade he received a note from her, which was so full of protestations of friendship and so delicately couched that he looked grave, and reflected that it was his duty to be courteous, and to answer such a call as that.

She begged him earnestly to come at one o'clock; she was suffering from headache, she said, and was very weak.