This made it easier to understand something else. Every few yards or so the explorer found a large heap of rust in the gutter, or what had once been the gutter. These heaps had little or no shape; yet the doctor fancied he could detect certain resemblances to things he had seen before, and shortly declared that they were the remains of motors.
"Can't say whether they were aircraft or autos, of course," he added, "but those things were certainly machines." Later, Rolla paid more attention to them, and the doctor positively identified them as former motor-cars.
The sun had gone down. It was still quite light, of course; darkness would not come for a couple of hours. Rolla munched on what food she had, and pressed on through the ruins. She saw skeletons and rusted engines everywhere, and once passed a rounded heap of rust which looked like nothing so much as a large cannon shell. Had the place been the scene of a battle?
Just when she had got rather accustomed to the place and was feeling more or less at her ease, she stopped short. At the same time the doctor himself fairly jumped in his chair. Somewhere, right near at hand, on one of the larger structures, a bell began to ring!
It clanged loudly and confidently, giving out perhaps thirty strokes before it stopped. The stillness which followed was pretty painful. In a moment, however, it was broken as effectively as any silence can be broken.
A man's voice sounded within the building.
Immediately it was replied to, more faintly, by several others. Then came the clatter of some sort of utensils, and sundry other noises which spoke loudly of humans. Rolla froze in her tracks, and her teeth began to chatter.
Next moment she got a grip on herself. "What difference doth it make, whether they be friend or enemy?" she argued severely, for the benefit of her shaking nerves. "They will give thee food, anyhow. And perchance they know where liveth the magic stone!"
In the end Rolla's high purpose prevailed over her weak knees, and she began to look for the entrance to the place. It was partly in ruins-that is, the upper stories-but the two lower floors seemed, so far as their interior could be seen through the high, unglazed windows, to be in good condition. There were no doors on that street.
Going around the corner, however, Rolla saw a high archway at the far corner of the structure. Approaching near enough to peek in, she saw that this arch provided an opening into a long corridor, such as might once have served as a wagon or auto entrance. After a little hesitation she went in.