De mortuis nil nisi bonum and all that, but you can't get away from facts.
That woman was a bad lot through and through.
You've only got to hunt round a bit in her unsavoury past."
Hercule Poirot said gently: "You did not like her?"
"I know a bit too much about her." In answer to the inquiring looks she went on. "My first cousin married one of the Erskines.
You've probably heard that that woman induced old Sir Robert when he was in his dotage to leave most of his fortune to her away from his own family."
Colonel Weston said: "And the family - er - resented that?"
"Naturally.
His association with her was a scandal anyway and on top of that to leave her a sum like fifty thousand pounds shows just the kind of woman she was.
I daresay I sound hard, but in my opinion the Arlena Stuarts of this world deserve very little sympathy.
I know of something else too - a young fellow who lost his head about her completely - he'd always been a bit wild, naturally his association with her pushed him over the edge.
He did something rather fishy with some shares - solely to get money to spend on her - and only just managed to escape prosecution.
That woman contaminated every one she met.
Look at the way she was ruining young Redfern.
No, I'm afraid I can't have any regret for her death - though of course it would have been better if she'd drowned herself, or fallen over a cliff.
Strangling is rather unpleasant."
"And you think the murderer was some one out of her past?"
"Yes, I do."
"Some one who came from the mainland with no one seeing him?"
"Why should any one see him?
We were all on the beach. I gather the Marshall child and Christine Redfern were down on Gull Cove out of the way. Captain Marshall was in his room in the hotel.
Then who on earth was there to see him except possibly Miss Darnley?"
"Where was Miss Darnley?"
"Sitting up on the cutting at the top of the cliff. Sunny Ledge it's called.
We saw her there, Mr Redfern and I, when we were rowing round the island."
Colonel Weston said: "You may be right, Miss Brewster."
Emily Brewster said positively: "I'm sure I'm right.
When a woman's neither more nor less than a nasty mess, then she herself will provide the best possible clue.
Don't you agree with me, M. Poirot?" Hercule Poirot looked up. His eyes met her confident grey ones.
He said: "Oh, yes - I agree with that which you have just this minute said.
Arlena Marshall herself is the best, the only clue, to her own death."
Miss Brewster said sharply:
"Well, then!" She stood there, an erect sturdy figure, her cool self-confident glance going from one man to the other.
Colonel Weston said: "You may be sure, Miss Brewster, that any clue there may be in Mrs Marshall's past life will not be overlooked."
Emily Brewster went out. Inspector Colgate shifted his position at the table. He said in a thoughtful voice:
"She's a determined one, she is.
And she'd got her knife in to the dead lady, proper, she had."
He stopped a minute and said reflectively:
"It's a pity in a way that she's got a cast-iron alibi for the whole morning.
Did you notice her hands, sir?
As big as a man's.
And she's a hefty woman - as strong and stronger than many a man I'd say..."
He paused again. His glance at Poirot was almost pleading.
"And you say she never left the beach this morning, M. Poirot?"
Slowly Poirot shook his head.
He said: "My dear Inspector, she came down to the beach before Mrs Marshall could have reached Pixy's Cove and she was within my sight until she set off with Mr Redfern in the boat."
Inspector Colgate said gloomily: "Then that washes her out."
He seemed upset about it.
As always, Hercule Poirot felt a keen sense of pleasure at the sight of Rosamund Darnley.
Even to a bare police inquiry into the ugly facts of murder she brought a distinction of her own.