After a few moments he regretted his thoughtless haste, and wished he had tried to follow backward the frescoes he had passed on the way in. True, they were so confused and duplicated that they could not have done him much good, but he wished none the less he had made the attempt. Those he now saw were even more horrible than those he had seen then, and he knew he was not in the corridors leading outside. In time he became quite sure he was not followed, and slackened his pace somewhat; but scarce had he breathed in half relief when a new peril beset him. His lamp was waning, and he would soon be in pitch blackness with no means of sight or guidance.