You must suppose an extreme case.

You may take my word for it that under certain circumstances Lucille would have no power to deny them anything." "But--without a word of farewell.

They could not insist upon her leaving you like that! It is incredible!" "It is quite possible," Mr.Sabin said.
Helene caught herself looking at him stealthily.

Was it possible that this wonderful brain had given way at last?
There were no signs of it in his face or expression.

But the Duchess of Dorset! Lady Carey! These were women of her own circle--Londoners, and the Duchess, at any rate, a woman of the very highest social position and unimpeached conventionality.
"This sounds--very extraordinary, UNCLE!" she remarked a little lamely.
"It is extraordinary," he answered drily.