"Before we do anything you have got to make me your promise."
"Yes; what is it?"
"That you will never, under any circumstances, tell anybody that I have informed you of that thing which I know."
"Of course I won't."
"That kind of loose way of answering won't suit me. You must answer me solemnly; and remember, before you make the promise which I am going to make you give me, that if you break it you bring a great deal of bad luck not only upon yourself, but upon Keith."
"Oh, I would not do him harm, my darling, for all the world!"
"Well, see you don't. You will if you break your vow."
"Vow!" said Kitty; "must I make a vow?"
"You must, and pretty sharp, too, if you want me to tell you what I know."
"All right," said Kitty, who was now overcome with curiosity. "Of course I'll do what you require."