In the midst of my agony a new terror laid hold of me. In falling my lamp had got wrong. I could not set it right, and its light was paling and would soon disappear altogether.

I gazed painfully upon the luminous current growing weaker and weaker in the wire coil. A dim procession of moving shadows seemed slowly unfolding down the darkening walls. I scarcely dared to shut my eyes for one moment, for fear of losing the least glimmer of this precious light. Every instant it seemed about to vanish and the dense blackness to come rolling in palpably upon me.

One last trembling glimmer shot feebly up. I watched it in trembling and anxiety; I drank it in as if I could preserve it, concentrating upon it the full power of my eyes, as upon the very last sensation of light which they were ever to experience, and the next moment I lay in the heavy gloom of deep, thick, unfathomable darkness.