The dry-dock was built in compartments, to ensure it against sinking, but the ingenuity which was to keep it above water now served effectually to keep it down.  Each one of these small water-tight compartments held the vessel fast to the bottom, as Gulliver was bound by innumerable threads to the ground of Lilliput.  It was necessary to break severally into the lower side of each of these chambers, and allow the water to flow evenly in all.  The interior of the hull was checkered by these boxes.  Huge beams and cross-ties intersected each other at right angles, forming the frame for this honeycombed interior, pigeon-holed like a merchant’s desk.  It was necessary to tear off the skin and penetrate from one to the other in order to effect this.

It was a difficult and tedious job under water.  The net of intersecting beams lay so close together that the passage between was exceedingly narrow and compressed, barely admitting the diver’s body.  The pens, so framed by intersecting beams, were narrowed and straitened, embarrassing attempts at labor in them, which the cold, slippery, serpent-like touch of the sea-water was not likely to make pleasanter.  It folded the shuddering body in its coils, and a most ancient and fish-like smell did not improve the situation.  The toil was multiplied by the innumerable pigeon-holes, as if they fitted into one another like a Chinese puzzle, with the unlucky diver in the middle box.  It was a nightmare of the sea, the furniture of a dream solidified in woody fibre.

Into one of these crowding holes the diver crawled.  There was the tedious work of tearing off the casing to occupy an hour or more, and when it was accomplished he endeavored to back out of his situation.  He was stopped fast and tight in his regression.  The arrangement of the armor about the head and shoulders, making a cone whose apex was the helmet, prevented his exit.  It was like the barb of a harpoon, and caught him fast in the wood.  Such a danger is not sudden in its revelation.  There is at first only a feeling of impatience at the embarrassment, a disposition to “tear things.”  In vain attempts at doubling and other gymnastic feats the diver wasted several hours, until his companions above became alarmed at the delay.  They renewed and increased their labors at the force-pump, and the impetuous torrent came surging about the diver’s ears.  It served to complete his danger.  It sprung the trap in which he lay enclosed.  The inflated armor swelled and filled up the crowded spaces.  It stiffened out the casing of the helmet to equal the burden of fifty pounds to the square inch, and made it as hard as iron.  He was caught like the gluttonous fox.  The bulky volume of included air made exit impossible.  It was no longer a labyrinth as before, where freedom of motion incited courage:  he was in the fetters of wind and water, bound fast to the floor of his dungeon den.  He signaled for the pump to stop.  It was the only alternative.  He might die without that life-giving air, but he would certainly die if its volume was not reduced.  The cock at the back of the helmet for discharging the vessel was out of his reach.  The invention never contemplated a case in which the diver would perish from the presence of air.