I was irresolutely speculating on when I had better attack the northward door, and on how I could least audibly manage it, when I noticed that the vague noises underfoot had given place to a fresh and heavier creaking of the stairs. A wavering flicker of light showed through my transom, and the boards of the corridor began to groan with a ponderous load. Muffled sounds of possible vocal origin approached, and at length a firm knock came at my outer door. For a moment I simply held my breath and waited. Eternities seemed to elapse, and the nauseous fishy odor of my environment seemed to mount suddenly and spectacularly. Then the knocking was repeated--continuously, and with growing insistence. I knew that the time for action had come, and forthwith drew the bolt of the northward connecting door, bracing myself for the task of battering it open. The knocking waxed louder, and I hoped that its volume would cover the sound of my efforts. At last beginning my attempt, I lunged again and again at the thin panelling with my left shoulder, heedless of shock or pain. Finally the connecting door gave, but with such a crash that I knew those outside must have heard. Instantly the outside knocking became a violent battering, while keys sounded ominously in the hall doors of the rooms on both sides of me. Rushing through the newly opened connection, I succeeded in bolting the northerly hall door before the lock could be turned; but even as I did so I heard the hall door of the third room--the one from whose window I had hoped to reach the roof below--being tried with a pass key. For an instant I felt absolute despair, since my trapping in a chamber with no window egress seemed complete. Then, with a dazed automatism, I made for the next connecting door and performed the blind motion of pushing at it in an effort to get through! Sheer fortunate chance gave me my reprieve--for the connecting door before me was not only unlocked but actually ajar. In a second I was through, and had my right knee and shoulder against a hall door which was visibly opening inward. My pressure took the opener off guard, for the thing shut as I pushed, so that I could slip the well-conditioned bolt as I had done with the other door. As I gained this respite I heard the battering at the two other doors abate, while a confused clatter came from the connecting door I had shielded with the bedstead. Evidently the bulk of my assailants had entered the southerly room and were massing in a lateral attack. But at the same moment a pass key sounded in the next door to the north, and I knew that a nearer peril was at hand.