'Sit down again, won't you, Harris?' he said, and Harris resumed his former place.

'What were you asking?' McKeith continued. 'Satisfactory to me is it? Yes, perfectly satisfactory, thank you.... I'm only amused—as you see... to find that I was quite right in my suspicions.' And he laughed in what Harris thought a very odd way.

'Eh? I don't take your meaning.' Harris' manner was distinctly objectionable.

McKeith gave him a sharp look, and his teeth went over his under lip. Then, to the man's evident surprise, he laughed again, throwing his head back so that the muscles of his throat showed under his beard, working, as it were, automatically. It really seemed as if the man's mechanical merriment were no part of himself. He was, in fact, gaining time to propound an explanation which he did not believe in the least, but which happened to be almost the exact truth.

He answered with an air of ironic indifference.

'Well, you know, I wouldn't go in for the detective line, if I were you, Harris. You aren't subtle enough for it. You jump too quickly at conclusions which have nothing to do with the main point. In fact, you're a fool, Harris—a damned fool.'

Harris' puzzled expression turned to one of extreme indignation. 'Seems to me, Mr McKeith, that it's you who are—well, damned queer about this affair. I'm sure I don't know what you've got to laugh at. But if you've found out who let the black-boy out of the hide-house, I'd be glad to know, that's all.'

McKeith ceased from his mirthless laughing and his sarcastic bluff. He leaned forward, facing Harris with his hands on the paper which he had laid on the table before him. He picked up the other's last words.

'Yes, that IS all. It's the only part of this note which concerns you. Well, I can tell you that it was the half-caste woman, as I thought, who let Wombo out of the hide-house. She stole the key from Mr Maule's room when HE was asleep, and let Wombo out when YOU were asleep—a longer time perhaps than you imagined, Harris. The black-boy made for the scrub, and I suppose they were in too great a hurry to think of shutting the door. Oola sneaked back—they've got the cunning of whites and blacks put together, those half-castes—and no doubt she guessed there'd be a hue and cry directly the door was found open. So she locked it again—and brought the key to her ladyship.'

McKeith seemed to force the last words from between his teeth.