The adoption of this line of conduct in all probability saved my life, for as the issue of the event proved, it was not to rob me, but to discover whether or no I were asleep, that my surreptitious visitor had entered my apartment. This fact became sufficiently patent when, after leaning over my bed for what, measured by my mental suffering was an eternity, during which, with a difficult exercise of self-control, I continued to respire like one in heavy slumber, he stole away again, without having meddled with my clothes or gone near the rude dressing-table upon which lay my watch. But my trial was not yet over. For I should think fully an hour after he had quitted the bed-chamber and carefully replaced the bolt, my unknown watcher remained listening outside the door; and throughout that time I neither dared stir a limb nor remit my sonorous breathing. Eventually, however, an exchange of whispers with some person or persons, who had evidently been awaiting, not far off, the result of this protracted test, was followed to my intense relief, by the sound of retreating footsteps. Upon how I passed the remainder of that dreadful night, with the long-drawn-out hours of early morning which succeeded, I am not about to dwell. But that no sleep visited my eyelids, and that, tortured by suspense and enforced inaction, my hard couch was by no means a bed of roses, it will readily be believed. Upon that couch nevertheless I forced myself to remain until considerably after seven o'clock; then, rising and dressing, I bathed my face in cold water, and studying it in the tiny mirror, strove carefully to remove all traces of solicitude or want of rest. But when ready at length to go forth from that chamber of horrors and satisfy myself, as I had been so feverishly longing to do, as to the truth or falsity of the theory (for after all it was little else) which I had based upon the events of the night, I shrank from doing so.