`Oh! you amuse me excessively

`Aye, very true, my dear,' cried the latter, though Jane had not spoken a word - `I was just going to say the same thing. It is time for us to be going indeed. The evening is closing in, and grandmama will be looking for us. My dear sir, you are too obliging. We really must wish you good night.'
Jane's alertness in moving, proved her as ready as her aunt had preconceived. She was immediately up, and wanting to quit the table; but so many were also moving, that she could not get away; and Mr. Knightley thought he saw another collection of letters anxiously pushed towards her, and resolutely swept away by her unexamined. She was afterwards looking for her shawl - Frank Churchill was looking also - it was growing dusk, and the room was in confusion; and how they parted, Mr. Knightley could not tell.
He remained at Hartfield after all the rest, his thoughts full of what he had seen; so full, that when the candles came to assist his observations, he must - yes, he certainly must, as a friend - an anxious friend - give Emma some hint, ask her some question. He could not see her in a situation of such danger, without trying to preserve her. It was his duty.
`Pray, Emma,' said he, `may I ask in what lay the great amusement, the poignant sting of the last word given to you and Miss Fairfax? I saw the word, and am curious to know how it could be so very entertaining to the one, and so very distressing to the other.'
Emma was extremely confused. She could not endure to give him the true explanation; for though her suspicions were by no means removed, she was really ashamed of having ever imparted them.
`Oh!' she cried in evident embarrassment, `it all meant nothing; a mere joke among ourselves.'
`The joke,' he replied gravely, `seemed confined to you and Mr. Churchill.'
He had hoped she would speak again, but she did not. She would rather busy herself about any thing than speak. He sat a little while in doubt. A variety of evils crossed his mind. Interference - fruitless interference. Emma's confusion, and the acknowledged intimacy, seemed to declare her affection engaged. Yet he would speak. He owed it to her, to risk any thing that might be involved in an unwelcome interference, rather than her welfare; to encounter any thing, rather than the remembrance of neglect in such a cause.
`My dear Emma,' said he at last, with earnest kindness, `do you think you perfectly understand the degree of acquaintance between the gentleman and lady we have been speaking of?'
`Between Mr. Frank Churchill and Miss Fairfax? Oh! yes, perfectly. - Why do you make a doubt of it?'
`Have you never at any time had reason to think that he admired her, or that she admired him?'
`Never, never!' she cried with a most open eagerness - `Never, for the twentieth part of a moment, did such an idea occur to me. And how could it possibly come into your head?'
`I have lately imagined that I saw symptoms of attachment between them - certain expressive looks, which I did not believe meant to be public.'
`Oh! you amuse me excessively. I am delighted to find that you can vouchsafe to let your imagination wander - but it will not do - very sorry to check you in your first essay - but indeed it will not do. There is no admiration between them, I do assure you; and the appearances which have caught you, have arisen from some peculiar circumstances - feelings rather of a totally different nature - it is impossible exactly to explain: - there is a good deal of nonsense in it - but the part which is capable of being communicated, which is sense, is, that they are as far from any attachment or admiration for one another, as any two beings in the world can be. That is, I presume it to be so on her side, and I can answer for its being so on his. I will answer for the gentleman's indifference.'
She spoke with a confidence which staggered, with a satisfaction which silenced, Mr. Knightley. She was in gay spirits, and would have prolonged the conversation, wanting to hear the particulars of his suspicions, every look described, and all the wheres and hows of a circumstance which highly entertained her: but his gaiety did not meet hers. He found he could not be useful, and his feelings were too much irritated for talking. That he might not be irritated into an absolute fever, by the fire which Mr. Woodhouse's tender habits required almost every evening throughout the year, he soon afterwards took a hasty leave, and walked home to the coolness and solitude of Donwell Abbey.