‘The signals?’

‘Yes, green if it’s all right, and red—for danger!’

‘Red—for danger—how thrilling!’ breathed Violet Eversleigh.

Dermot turned from her rather impatiently.

‘That’s just a way of describing it, of course. Danger ahead! The red signal! Look out!’

Trent stared at him curiously.

‘You speak as though it were an actual experience, Dermot, old boy.’

‘So it is—has been, I mean.’

‘Give us the yarn.’

‘I can give you one instance. Out in Mesopotamia—just after the Armistice, I came into my tent one evening with the feeling strong upon me. Danger! Look out! Hadn’t the ghost of a notion what it was all about. I made a round of the camp, fussed unnecessarily, took all precautions against an attack by hostile Arabs. Then I went back to my tent. As soon as I got inside, the feeling popped up again stronger than ever. Danger! In the end, I took a blanket outside, rolled myself up in it and slept there.’

‘Well?’

‘The next morning, when I went inside the tent, first thing I saw was a great knife arrangement—about half a yard long—struck down through my bunk, just where I would have lain. I soon found out about it—one of the Arab servants. His son had been shot as a spy. What have you got to say to that, Uncle Alington, as an example of what I call the red signal?’

The specialist smiled non-committally.

‘A very interesting story, my dear Dermot.’

‘But not one that you would accept unreservedly?’

‘Yes, yes, I have no doubt that you had the premonition of danger, just as you state. But it is the origin of the premonition I dispute. According to you, it came from without, impressed by some outside source upon your mentality. But nowadays we find that nearly everything comes from within—from our subconscious self.’

‘Good old subconscious,’ cried Jack Trent. ‘It’s the jack-of-all-trades nowadays.’

Sir Alington continued without heeding the interruption.

‘I suggest that by some glance or look this Arab had betrayed himself. Your conscious self did not notice or remember, but with your subconscious self it was otherwise. The subconscious never forgets. We believe, too, that it can reason and deduce quite independently of the higher or conscious will. Your subconscious self, then, believed that an attempt might be made to assassinate you, and succeeded in forcing its fear upon your conscious realization.’

‘That sounds very convincing, I admit,’ said Dermot, smiling.

‘But not nearly so exciting,’ pouted Mrs Eversleigh.

‘It is also possible that you may have been subconsciously aware of the hate felt by the man towards you. What in old days used to be called telepathy certainly exists, though the conditions governing it are very little understood.’

‘Have there been any other instances?’ asked Claire of Dermot.

‘Oh! yes, but nothing very pictorial—and I suppose they could all be explained under the heading of coincidence. I refused an invitation to a country house once, for no other reason than the hoisting of the “red signal”. The place was burnt out during the week. By the way, Uncle Alington, where does the subconscious come in there?’