Read it through once

Over the prisoner’s head there was a mirror, to throw the light down upon him. Crowds of the wicked and the wretched had been reflected in it, and had passed from its surface and this earth’s together. Haunted in a most ghastly manner that abominable place would have been, if the glass could ever have rendered back its reflections, as the ocean is one day to give up its dead. Some passing thought of the infamy and disgrace for which it had been reserved, may have struck the prisoner’s mind. Be that as it may, a change in his position making him conscious of a bar of light across his face, he looked up; and when he saw the glass his face flushed, and his right hand pushed the herbs away.