I was actually congratulating the Navigator on our escape, and I had just told the gun's crew to cease firing at the blurred outlines on the port quarter from which the random shells still came, when there was a sheet of yellow flame and a jar which threw me against the signalman. The latter had been standing near the conning-tower hatch, and unfortunately I knocked him off his balance, and he fell with a thud into the upper conning tower. He had the good fortune to escape with a couple of ribs broken, but when I recovered myself and got to my feet, far worse consequences met my eyes. By the worst of ill-luck, a shell which must have been fired practically at random had hit the gun just below the port trunnion. The result of the explosion was very severe. Four of the seven men at the gun had been blown overboard, the breech worker was uninjured, though from the way he swayed about it was evident that he was dazed, and I expected to see him fall over the side at any moment. The remaining two men were as dead as horse-flesh. The material damage was even more serious. The gun had been practically thrown out of its cradle, but in the main the trunnion blocks had held firm, and the whole pedestal had been carried over to starboard. The really terrible effects of this injury were not apparent at first sight, but I soon realized them, for an hour later (we had shaken off the sloop) I saw red flame on the horizon, which plainly indicated flaming at the funnel from some destroyer doubtless looking for us at high speed. I dived, intending to surface again as soon as possible. With this intention in my head, I did not go below the upper conning tower. We had barely got to ten metres, when loud cries from below and the disquieting noise of rushing water told me that something was wrong. I blew all tanks, surfaced, left the First Lieutenant on watch and went below. There were five centimetres of water on the battery boards, and I understood at once that we could never dive again. For the pedestal of the gun, in being forced over, had strained the longitudinal seam of the pressure hull, to which it is bolted, and a shower of water had come through as soon as we got under. It might have been hoped that this was enough, but no! our cup was not yet full. Chlorine gas suddenly began to fill the fore-end. The salt water running down into the battery tanks had found acid, and though I ordered quantities of soda to be put down into the tank, it became, and still is at the moment of writing, impossible to move forward of the conning tower without putting on a gas mask and oxygen helmet. So we are helpless, and at the mercy of any little trawler, or even the weather. We have no gun; we cannot dive. The English must know that they have hit us, and every hour I expect to see the hull of a destroyer climb over the horizon astern.