The spot where the projectile sank under the waves was exactly known; but the machinery to grasp it and bring it to the surface of the ocean was still wanting. It must first be invented, then made. American engineers could not be troubled with such trifles. The grappling-irons once fixed, by their help they were sure to raise it in spite of its weight, which was lessened by the density of the liquid in which it was plunged.
But fishing-up the projectile was not the only thing to be thought of.
They must act promptly in the interest of the travelers. No one doubted that they were still living.
"Yes," repeated J. T. Maston incessantly, whose confidence gained over everybody, "our friends are clever people, and they cannot have fallen like ******tons. They are alive, quite alive;but we must make haste if we wish to find them so. Food and water do not trouble me; they have enough for a long while.
But air, air, that is what they will soon want; so quick, quick!"And they did go quick. They fitted up the Susquehanna for her new destination. Her powerful machinery was brought to bear upon the hauling-chains. The aluminum projectile only weighed 19,250 pounds, a weight very inferior to that of the transatlantic cable which had been drawn up under similar conditions. The only difficulty was in fishing up a cylindro-conical projectile, the walls of which were so smooth as to offer no hold for the hooks.
On that account Engineer Murchison hastened to San Francisco, and had some enormous grappling-irons fixed on an automatic system, which would never let the projectile go if it once succeeded in seizing it in its powerful claws. Diving-dresses were also prepared, which through this impervious covering allowed the divers to observe the bottom of the sea. He also had put on board an apparatus of compressed air very cleverly designed.
There were perfect chambers pierced with scuttles, which, with water let into certain compartments, could draw it down into great depths. These apparatuses were at San Francisco, where they had been used in the construction of a submarine breakwater;and very fortunately it was so, for there was no time to construct any. But in spite of the perfection of the machinery, in spite of the ingenuity of the savants entrusted with the use of them, the success of the operation was far from being certain.
How great were the chances against them, the projectile being 20,000 feet under the water! And if even it was brought to the surface, how would the travelers have borne the terrible shock which 20,000 feet of water had perhaps not sufficiently broken?
At any rate they must act quickly. J. T. Maston hurried the workmen day and night. He was ready to don the diving-dress himself, or try the air apparatus, in order to reconnoiter the situation of his courageous friends.
But in spite of all the diligence displayed in preparing the different engines, in spite of the considerable sum placed at the disposal of the Gun Club by the Government of the Union, five long days (five centuries!) elapsed before the preparations were complete. During this time public opinion was excited to the highest pitch. Telegrams were exchanged incessantly throughout the entire world by means of wires and electric cables.
The saving of Barbicane, Nicholl, and Michel Ardan was an international affair. Every one who had subscribed to the Gun Club was directly interested in the welfare of the travelers.
At length the hauling-chains, the air-chambers, and the automatic grappling-irons were put on board. J. T. Maston, Engineer Murchison, and the delegates of the Gun Club, were already in their cabins. They had but to start, which they did on the 21st of December, at eight o'clock at night, the corvette meeting with a beautiful sea, a northeasterly wind, and rather sharp cold. The whole population of San Francisco was gathered on the quay, greatly excited but silent, reserving their hurrahs for the return. Steam was fully up, and the screw of the Susquehanna carried them briskly out of the bay.
It is needless to relate the conversations on board between the officers, sailors, and passengers. All these men had but one thought. All these hearts beat under the same emotion.
While they were hastening to help them, what were Barbicane and his companions doing? What had become of them? Were they able to attempt any bold maneuver to regain their liberty? None could say.
The truth is that every attempt must have failed! Immersed nearly four miles under the ocean, this metal prison defied every effort of its prisoners.
On the 23rd inst., at eight in the morning, after a rapid passage, the Susquehanna was due at the fatal spot. They must wait till twelve to take the reckoning exactly. The buoy to which the sounding line had been lashed had not yet been recognized.
At twelve, Captain Blomsberry, assisted by his officers who superintended the observations, took the reckoning in the presence of the delegates of the Gun Club. Then there was a moment of anxiety. Her position decided, the Susquehanna was found to be some minutes westward of the spot where the projectile had disappeared beneath the waves.
The ship's course was then changed so as to reach this exact point.
At forty-seven minutes past twelve they reached the buoy; it was in perfect condition, and must have shifted but little.
"At last!" exclaimed J. T. Maston.
"Shall we begin?" asked Captain Blomsberry.
"Without losing a second."
Every precaution was taken to keep the corvette almost completely motionless. Before trying to seize the projectile, Engineer Murchison wanted to find its exact position at the bottom of the ocean. The submarine apparatus destined for this expedition was supplied with air. The working of these engines was not without danger, for at 20,000 feet below the surface of the water, and under such great pressure, they were exposed to fracture, the consequences of which would be dreadful.
