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Next day the masthead of their boat was seen sticking out of the water near Sunday Island. The pilot schooner went down and hauled the boat to the surface, but nothing was found in her except the sand-ballast and a bottle of rum. Her sheet was made fast, and when the squall struck her she had gone down like a stone. The Isle of Blasted Hopes was useless even as an asylum for inebriates.
Most fortunately I had not sand-ballast, in tarred bags, as most of our pleasure-boats had, but water-ballast in breakers, which now proved no additional burthen to the boat. It was also fortunate that she was built partly of deal, and had only her lower streaks of jarra wood, which does not float.
My ship was the Speranza, which brought me from Havre, for at Calais, to which I first went, I could find nothing suitable for all purposes, the Speranza being an American yacht, very palatially fitted, three-masted, air-driven, with a carrying capacity of 2,000 tons, Tobin-bronzed, in good condition, containing sixteen interacting tanks, with a five-block pulley-arrangement amid-ships that enables me to lift very considerable weights without the aid of the hoisting air-engine, high in the water, sharp, handsome, containing a few tons only of sand-ballast, and needing when I found her only three days' work at the water-line and engines to make her decent and fit.
One novel and exceedingly simple device bore witness to the ingenuity of the inventor. He had noticed in his days of free ballooning that to rise the aeronaut had to throw out sand-ballast; to descend he had to open the valves and let out gas. As his supply of both gas and sand was limited it was clear that the time of his flight was necessarily curtailed every time he ascended or descended.
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