Yet, somehow or other, after another long spell of smoking, talking and roasting themselves before the great fire, the shadow that had so suddenly invaded their peaceful camp began to shirt.  Perhaps Defago’s efforts, or the return of his quiet and normal attitude accomplished this; perhaps Simpson himself had exaggerated the affair out of all proportion to the truth; or possibly the vigorous air of the wilderness brought its own powers of healing.  Whatever the cause, the feeling of immediate horror seemed to have passed away as mysteriously as it had come, for nothing occurred to feed it.  Simpson began to feel that he had permitted himself the unreasoning terror of a child.  He put it down partly to a certain subconscious excitement that this wild and immense scenery generated in his blood, partly to the spell of solitude, and partly to overfatigue.  That pallor in the guide’s face was, of course, uncommonly hard to explain, yet it might have been due in some way to an effect of firelight, or his own imagination ...He gave it the benefit of the doubt; he was Scotch.

When a somewhat unordinary emotion has disappeared, the mind always finds a dozen ways of explaining away its causes ...Simpson lit a last pipe and tried to laugh to himself.  On getting home to Scotland it would make quite a good story.  He did not realize that this laughter was a sign that terror still lurked in the recesses of his soul—­that, in fact, it was merely one of the conventional signs by which a man, seriously alarmed, tries to persuade himself that he is not so.

Defago, however, heard that low laughter and looked up with surprise on his face.  The two men stood, side by side, kicking the embers about before going to bed.  It was ten o’clock—­a late hour for hunters to be still awake.

“What’s ticklin’ yer?” he asked in his ordinary tone, yet gravely.

“I—­I was thinking of our little toy woods at home, just at that moment,” stammered Simpson, coming back to what really dominated his mind, and startled by the question, “and comparing them to—­to all this,” and he swept his arm round to indicate the Bush.

A pause followed in which neither of them said anything.

“All the same I wouldn’t laugh about it, if I was you,” Defago added, looking over Simpson’s shoulder into the shadows.  “There’s places in there nobody won’t never see into—­nobody knows what lives in there either.”

“Too big—­too far off?” The suggestion in the guide’s manner was immense and horrible.

Defago nodded.  The expression on his face was dark.  He, too, felt uneasy.  The younger man understood that in a hinterland of this size there might well be depths of wood that would never in the life of the world be known or trodden.  The thought was not exactly the sort he welcomed.  In a loud voice, cheerfully, he suggested that it was time for bed.  But the guide lingered, tinkering with the fire, arranging the stones needlessly, doing a dozen things that did not really need doing.  Evidently there was something he wanted to say, yet found it difficult to “get at.”