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 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 to 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 abroad, and now swiftly—and yet with dream-like gentleness—impelled against my guide. So does a child’s balloon divagate upon the currents of the air, and touch, and slide off again from every obstacle. So must have ineffectually swung, so resented their inefficiency, those light crowds that followed the Star of Hades, and uttered exiguous voices in the land beyond Cocytus.