Bob had told me ere this a little tale, a five minutes' drama at the bottom of the sea, which at that moment possibly shot across my mind. He was down with another, settling a stone of the sea-wall. They had it well adjusted, Bob gave the signal, the scissors were slipped, the stone set home; and it was time to turn to something else. But still his companion remained bowed over the block like a mourner on a tomb, or only raised himself to make absurd contortions and mysterious signs unknown to the vocabulary of the diver. There, then, these two stood for a while, like the dead and the living; till there flashed a fortunate thought into Bob's mind, and he stooped, peered through the window of that other world, and beheld the face of its inhabitant wet with streaming tears. Ah! the man was in pain! And Bob, glancing downward, saw what was the trouble: the block had been lowered on the foot of that unfortunate--he was caught alive at the bottom of the sea under fifteen tons of rock. That two men should handle a stone so heavy, even swinging in the scissors, may appear strange to the inexpert. These must bear in mind the great density of the water of the sea, and the surprising results of transplantation to that medium. To understand a little what these are, and how a man's weight, so far from being an encumbrance, is the very ground of his agility, was the chief lesson of my submarine experience. The knowledge came upon me by degrees. As I began to go forward with the hand of my estranged companion, a world of tumbled stones {174} was visible, pillared with the weedy uprights of the staging: overhead, a flat roof of green: a little in front, the sea-wall, like an unfinished rampart. And presently in our upward progress, Bob motioned me to leap upon a stone; I looked to see if he were possibly in earnest, and he only signed to me the more imperiously. Now the block stood six feet high; it would have been quite a leap to me unencumbered; with the breast and back weights, and the twenty pounds upon each foot, and the staggering load of the helmet, the thing was out of reason. I laughed aloud in my tomb; and to prove to Bob how far he was astray, I gave a little impulse from my toes. Up I soared like a bird, my companion soaring at my side. As high as the stone, and then higher, I pursued my impotent and empty flight. Even when the strong arm of Bob had checked my shoulders, my heels continued their ascent; so that I blew out sideways like an autumn leaf, and must be hauled in, hand over hand, as sailors haul in the slack of a sail, and propped upon my feet again like an intoxicated sparrow. Yet a little higher on the foundation, and we began to be affected by the bottom of the swell, running there like a strong breeze of wind. Or so I must suppose; for, safe in my cushion of air, I was conscious of no impact; only swayed idly like a weed, and was now borne helplessly