“Never mind; you will later. And now,” he added, “we will go over the wood and see what we can find.”

His words explained to me something of his method. We were to keep our minds alert and report to each other the least fancy that crossed the picture-gallery of our thoughts. Then, just as we started, he turned again to me with a final warning.

“And, for your safety,” he said earnestly, “imagine now—and for that matter, imagine always until we leave this place—imagine with the utmost keenness, that you are surrounded by a shell that protects you. Picture yourself inside a protective envelope, and build it up with the most intense imagination you can evoke. Pour the whole force of your thought and will into it. Believe vividly all through this adventure that such a shell, constructed of your thought, will and imagination, surrounds you completely, and that nothing can pierce it to attack.”

He spoke with dramatic conviction, gazing hard at me as though to enforce his meaning, and then moved forward and began to pick his way over the rough, tussocky ground into the wood. And meanwhile, knowing the efficacy of his prescription, I adopted it to the best of my ability.

The trees at once closed about us like the night. Their branches met overhead in a continuous tangle, their stems crept closer and closer, the brambly undergrowth thickened and multiplied. We tore our trousers, scratched our hands, and our eyes filled with fine dust that made it most difficult to avoid the clinging, prickly network of branches and creepers. Coarse white grass that caught our feet like string grew here and there in patches. It crowned the lumps of peaty growth that stuck up like human heads, fantastically dressed, thrusting up at us out of the ground with crests of dead hair. We stumbled and floundered among them. It was hard going, and I could well conceive it impossible to find a way at all in the night-time. We jumped, when possible, from tussock to tussock, and it seemed as though we were springing among heads on a battlefield, and that this dead white grass concealed eyes that turned to stare as we passed.

Here and there the sunlight shot in with vivid spots of white light, dazzling the sight, but only making the surrounding gloom deeper by contrast And on two occasions we passed dark circular places in the grass where fires had eaten their mark and left a ring of ashes. Dr. Silence pointed to them, but without comment and without pausing, and the sight of them woke in me a singular realisation of the dread that lay so far only just out of sight in this adventure.

It was exhausting work, and heavy going. We kept close together. The warmth, too, was extraordinary. Yet it did not seem the warmth of the body due to violent exertion, but rather an inner heat of the mind that laid glowing hands of fire upon the heart and set the brain in a kind of steady blaze. When my companion found himself too far in advance, he waited for me to come up. The place had evidently been untouched by hand of man, keeper, forester or sportsman, for many a year; and my thoughts, as we advanced painfully, were not unlike the state of the wood itself—dark, confused, full of a haunting wonder and the shadow of fear.

By this time all signs of the open field behind us were hid. No single gleam penetrated. We might have been groping in the heart of some primeval forest. Then, suddenly, the brambles and tussocks and string-like grass came to an end; the trees opened out; and the ground began to slope upwards towards a large central mound. We had reached the middle of the plantation, and before us stood the broken Druid stones our host had mentioned. We walked easily up the little hill, between the sparser stems, and, resting upon one of the ivy-covered boulders, looked round upon a comparatively open space, as large, perhaps, as a small London Square.

Thinking of the ceremonies and sacrifices this rough circle of prehistoric monoliths might have witnessed, I looked up into my companion’s face with an unspoken question. But he read my thought and shook his head.

“Our mystery has nothing to do with these dead symbols,” he said, “but with something perhaps even more ancient, and of another country altogether.”