Feeling sorry for Scotland Yard was the last thing he had anticipated. But sorry he was. All Scotland Yard's energies were devoted to proving the Sharpes guilty and Betty Kane's story true; for the very good reason that they believed the Sharpes to be guilty. But what each one of them ached in his private soul to do was to push Betty Kane down the Ack-Emma 's throat; and they could only do that by proving her story nonsense. Yes, a really prize state of frustration existed in those large calm bodies at the Yard.

Grant had been charming in his quiet reasonable way-it had been rather like going to see a doctor, now he came to think of it-and had quite willingly agreed that Robert should be told about any letters that the Ack-Emma might provoke.

"Don't pin your hopes too firmly to that, will you," he had said, in friendly warning. "For one letter that the Yard gets that has any worth it gets five thousand that are nonsense. Letterwriting is the natural outlet of the 'odds. The busybodies, the idle, the perverted, the cranks, the feel-it-my-duties—"

"'Pro Bono Publico'—"

"Him and 'Civis'," Grant said with a smile. "Also the plain depraved. They all write letters. It's their safe outlet, you see. They can be as interfering, as long-winded, as obscene, as pompous, as one-idea'd, as they like on paper, and no one can kick them for it. So they write. My God, how they write!"

"But there is a chance—"

"Oh, yes. There is a chance. And all these letters will have to be weeded out, however silly they are. Anything of importance will be passed on to you, I promise. But I do remind you that the ordinary intelligent citizen writes only one time in five thousand. He doesn't like what he thinks of as 'poking his nose in'-which is why he sits silent in a railway carriage and scandalises the Americans, who still have a hick interest in other folk-and anyhow he's a busy man, full of his own affairs, and sitting down to a letter to the police about something that doesn't concern him is against all his instincts."

So Robert had come away pleased with the Yard, and sorry for them. At least he, Robert, had a straight row to hoe. He wouldn't be glancing aside every now and then and wishing it was the next row he was hoeing. And moreover he had Kevin's approval of the row he had chosen.

"I mean it," Kevin had said, "when I say that if I were the police I should almost have risked it. They have a good enough case. And a nice little conviction is always a hitch up the ladder of promotion for someone. Unfortunately-or fortunately for the citizen-the man who decides whether there is a case or not is the chap higher up, and he's not interested in any subordinate's speedy promotion. Amazing that wisdom should be the by-product of office procedure."

Robert, mellow with whisky, had let the cynicism flow past him.