At first the prelate could not make it out against the radiance below, but an instant later, as they rushed on, it loomed up, sudden and enormous, itself blazing with lights against the dark sea. It looked to him something like a floating stage, outlined with fire; and there were glimmering, perpendicular lines beneath it which he could not understand, running down to lose themselves in the misty glow three hundred feet beneath.
"How's it done?" he asked.
"It's a platform, charged of course with aeroline. It runs on lines straight up from the stage beneath, and keeps itself steady with screws. You'll see it go down after we've left again. Come to the stern, we shall see better from there."
By the time that they had reached the other end of the ship, the pace had rapidly diminished almost to motionlessness; and as soon as Monsignor could attend again, he perceived that there was sliding at a footpace past their starboard side the edge of the huge platform that he had seen just now half a mile away. For a moment or two it swayed up and down; there was a slight vibration; and then he heard voices and the trampling of footsteps.
"The bridges are fixed," remarked the priest. "They're on the lower deck, of course. Pretty prompt, aren't they?"
The prelate stood, staring with all his eyes; now at the motionless platform that hung alongside, now at the gulf below with the fairy lights strewed like stars and nebulae at its bottom. It seemed impossible to realize that this station in the air was not the normal level, and the earth not a strange foreign body that attended on it. There came up on deck presently a dozen figures or so, carrying wraps, and talking. It was amazing to him that they could behave with such composure. Two were even quarrelling in subdued voices. . . .
It was hardly five minutes before the three bells rang again; and before the fourth sounded, suddenly he saw drop beneath, like a stone into a pit, the huge immovable platform that just now he had conceived of as solid as the earth from which it had risen. Down and down it went, swaying ever so slightly from side to side, diminishing as it went; but before the motion had ceased the fourth bell rang, and he clutched the rail to steady himself as the ship he was on soared again with a strange intoxicating motion. The next instant, as he glanced over the edge, he saw that they were far out over the blackness of the sea.
"I think we might go below for a bit," said the priest in his ear.
There was no kind of difficulty in descending the stairs; there was practically no oscillation of any kind in this still and windless summer night, and the two came down easily and looked round the lower deck.
This was far more crowded with figures: there were padded seats fully occupied running round all the sides, beneath the enormous continuous windows. In the centre, sternwards, ran a narrow refreshment bar, where a score of men were standing to refresh themselves. Forward of the farther stairs (down the well of which they had seen the engineer's head), by which they were standing, the deck was closed in, as with cabins.