For a moment I simply held my breath and waited. Eternities seemed to elapse, and the nauseous fishy odour 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 paneling with my left shoulder, heedless of shock or pain. The door resisted even more than I expected, but I did not give in. And all the while the clamour at the outer door increased.