This crack was formed by the bottom of the door and the level surface of the floor; there was no sill. The door was perfectly hung, for the crack seemed to be of uniform size. The Very Young Man showed it to Aura.
"There's the way out," he whispered. "Through there and then large again on the other side."
He made his calculation of size carefully, and then, crushing one of the pills into powder, divided a portion of it between himself and the girl. Aura seemed tired and the drug made her very dizzy. They both sat upon the stone floor, close up to the door, and closed their eyes. When, by the feeling of the floor beneath them, they knew the action of the drug was over, they stood up unsteadily and looked around them.
They now found themselves standing upon a great stone plain. The ground beneath their feet was rough, but as far away as they could see, out up to the horizon, it was mathematically level. This great expanse was empty except in one place; over to the right there appeared a huge, irregular, blurred mass that might have been, by its look, a range of mountains. But the mass moved as they stared at it, and the Very Young Man knew it was the nearest one of Targo's men, sitting beside the table.
In the opposite direction, perhaps a hundred yards away from where they were standing, they could see the bottom of the door. It hung in the air some fifty feet above the surface of the ground. They walked over and stood underneath; like a great roof it spread over them—a flat, level surface parallel with the floor beneath.
At this extraordinary change in their surroundings Aura seemed frightened, but seeing the matter-of-fact way in which her companion acted, she maintained her composure and soon was much interested in this new aspect of things. The Very Young Man took a last careful look around and then, holding Aura by the hand, started to cross under the door in a direction he judged to be at right angles to its length.
They walked swiftly, trying to keep their sense of direction, but having no means of knowing whether they were doing so or not. For perhaps ten minutes they walked; then they emerged on the other side of the door and again faced a great level, empty expanse.
"We're under," the Very Young Man remarked with relief. "Do you know where Loto is from here?"
Aura had recovered her self-possession sufficiently to smile.
"I might, perhaps," she answered, with a pretty little shrug. "But it's a long way, don't you think? A hundred miles, it may be?"