It could not be, so it was not!
"But what she told me was more difficult still.
"She assured me that she had actually seen Anne Meredith commit the crime.
"It was not till the following morning, when I stood by a dead woman's bed, that I saw how I could still be right and Mrs. Lorrimer still have spoken the truth.
"Anne Meredith went over to the fireplace and saw that Mr. Shaitana was dead!
She stooped over him, perhaps stretched out her hand to the gleaming head of the jeweled pin.
"Her lips part to call out, but she does not call out.
She remembers Shaitana's talk at dinner.
Perhaps he has left some record.
She, Anne Meredith, has a motive for desiring his death.
Everyone will say that she has killed him.
She dare not call out.
Trembling with fear and apprehension she goes back to her seat.
"So Mrs. Lorrimer is right, since she, as she thought, saw the crime committed; but I am right too, for actually she did not see it.
"If Roberts had held his hand at this point, I doubt if we could have ever brought his crimes home to him.
We might have done so, by a mixture of bluff and various ingenious devices. I would at any rate have tried. But he lost his nerve and, once again, overbid his hand. And this time the cards lay wrong for him and he came down heavily.
"No doubt he was uneasy.
He knew that Battle was nosing about.
He foresaw the present situation going on indefinitely, the police still searching - and perhaps, by some miracle, coming on traces of his former crimes.
He hit upon the brilliant idea of making Mrs. Lorrimer the scapegoat for the party.
His practiced eye guessed, no doubt, that she was ill and that her life could not be very much prolonged.
How natural in those circumstances for her to choose a quick way out and, before taking it, confess to the crime!
So he manages to get a sample of her hand-writing-forges three identical letters and arrives at the house hotfoot in the morning with his story of the letter he has just received.
His parlormaid quite correctly is instructed to ring up the police.
All he needs is a start.
And he gets it.
By the time the police surgeon arrives it is all over.
Doctor Roberts is ready with his story of artificial respiration that has failed.
It is all perfectly plausible, perfectly straightforward.
"In all this he has no idea of throwing suspicion on Anne Meredith.
He does not even know of her visit the night before.
It is suicide and security only that he is aiming at.
"It is in fact an awkward moment for him when I ask if he is acquainted with Mrs. Lorrimer's handwriting.
If the forgery has been detected he must save himself by saying that he has never seen her handwriting.
His mind works quickly, but not quickly enough.
"From Wallingford I telephone to Mrs. Oliver.
She plays her part by lulling his suspicions and bringing him here.
And then when he is congratulating himself that all is well, though not exactly in the way he has planned, the blow falls.
Hercule Poirot springs!
And so - the gambler will gather in no more tricks.
He has thrown his cards upon the table.
C'est fini."
There was silence.
Rhoda broke it with a sigh.
"What amazing luck that window cleaner happened to be there," she said.
"Luck?
Luck?
That was not luck, mademoiselle.
That was the gray cells of Hercule Poirot.
And that reminds me -" He went to the door.