It was not as long as it seemed before I was on the wreck, and down below in the nearest hold. Regular professionals had already been at work, and access to different parts of the ship had been made easy. Now, in this big hold was an immense number of barrels, stood on end and packed tightly together--barrels of oil, to judge from externals. I tried to move one, but plainly they were all jammed tightly together, and not one would shift. I took the light axe with which I had furnished myself, using it alternately as wedge and lever, and at last felt the barrel move. I had certainly loosened it, and pulled up the axe with the intention of trying to lift the barrel, when I was suddenly engulfed in an awful convulsion as of many earthquakes in a free fight. The world was a mob of bouncing oil-barrels, which hit me everywhere as I floundered in intricate somersaults, and finally found myself staggering at the bottom of the hold, and staring at the roof, whereunto all the barrels were sticking like balloons, absolutely blocking up the hatchway above me. What was this? Some demoniac practical joke of fiends inhabiting this awful green sea about me? Were they grinning at me from corners of the hold? or had some vast revolution in the ways of Nature taken place in a second, and the law of gravity been reversed? It was not at all warm down there, but I perspired violently. Then a notion flashed upon me. Those barrels must have been _empty_. Jammed together, they stayed below, of course, but once the jam was loosened they would fly at once towards the surface. Then I thought more. I had been an ass. Of course, those barrels would do as they had done, even were they full of oil. Oil floats on water, as anybody should know. They might be either full or empty, it didn't matter a bit. I had forgotten that I was moving in a different element from the air I was used to, where barrels of oil did _not_ incontinently fly up into space without warning. Obviously, I had made a fool of myself, but I had some comfort in the reflection that there was nobody about to see it. Then it came upon me suddenly that I would rather have someone there after all, for I was helpless! Those horrible barrels were having another jam in the hatchway now, and my retreat was cut off entirely. Here I was like a rat in a cage, boxed in on every side. My communication-cord and my air-pipe led up between the barrels, to outer safety; but what of that? I perspired again. What would happen to me now? Why did I ever make a submarine Guy Fawkes of myself, and thus go fooling about, where I had no business, at the end of a flexible gas-pipe? If I could have dated myself back an hour at that moment, I believe I should have changed my mind about going in for this amusement. At this, I began thinking about trivial things again--how, paraphrasing a certain definition of angling, diving might be described as matter of a pipe with a pump at one end and something