The air was so pure and fresh, even after this turn was made, as to lead her to believe there must somewhere be another opening.

The vague thought brought with it a throb of hope.
Her view was limited to the slight radius illumined by the lantern, and even within that small area, her own shadow, and those of the three men, helped render everything indistinct.

The side walls appeared to be of solid rock; she perceived no evidence of entrances into any side chamber, only that her eyes twice caught glimpses of what seemed like narrow slits at about the level of her head.

She could not be certain as to their purpose, or ascertain exactly what they were, only they bore resemblance to an opening cleft in the rock, either for ventilation, or to permit of observation from without of some interior cell.

Near each of these was a strangely shaped bracket of wood fastened in some manner to the side wall, apparently intended for the support of a light, as the ceiling above exhibited marks of smoke.
They had turned the sharp corner, and advanced a few feet beyond when the man with the lantern stopped suddenly, and held it up to permit the light to stream full on the exposed wall to the right.