Not until that moment did I notice two things: that there was no fastening of any kind to keep the thick lid in place: and that the three-quarter-inch cable looked like a pack thread in comparison to the ponderous bulk it strained to support.
"We couldn't use a heavier cable," said the Professor, "because of the strain. We're overloading the hoist as it is. As for the lid being fastened down—I think you'll find it will be pressed into place securely enough!"
There was unanimous silence as the great globe slipped into the sea—down and down until the last reflection of the morning sun ceased to shimmer from its surface. Drum after drum was played out, till the first mate held his hand up to check the engineer.
"Five thousand feet, sir," he called to Stanley.
"Haul it back up. And let us hope," Stanley added fervently, "that we'll find the gadget in one piece."
The engine began to snort rhythmically. Dripping, vibrating, the coils of cable began to crawl back in place on the drums. There was a glint under the surface again as the sunlight reflected on the nearing sphere.
The great ball flashed out of the water, and a cheer burst from the throats of all of us. It was absolutely unharmed. Only—there was a beading of fine moisture inside the thick globe. What that could mean, none of us could figure out.
"Difference in temperature?" worried the Professor. "No, it's as cold inside as out. Molecules of water driven by sheer pressure through five feet of glass to unite in drops on the inside? Possibly. Well, there's one way to find out. Stanley, Martin—are you ready?"
We nodded, and prepared to visit the bottom a mile below the Rosa's keel. The preparation consisted merely in donning heavy, fleece-lined jumpers to protect us from the cold of the sunless depths.