"I wonder if I ought to." "Why do you wonder if you 'ought to ?'" "Don't you guess ?" "No." "Then let's both be mysteries to each other," she suggested.

"I mystify you because I wonder, and you mystify me because you don't guess why I wonder.

We'll let it go at that, shall we ?" "Very well; so long as it's certain that you DON'T tell me not to come again." "I'll not tell you that--yet," she said.

"In fact----" She paused, reflecting, with her head to one side.

"In fact, I won't tell you not to come, probably, until I see that's what you want me to tell you.
I'll let you out easily--and I'll be sure to see it.