Some years ago, at Bridgeport, Connecticut, there was launched a boat, The Protector, which could go on the water, under the water, and also upon land. Built by an inventor named Lake, supplied with two motors, an electric one of seventy-five horse power, and a gasoline one of two hundred and fifty horse power, it was also provided with wheels a yard in diameter, which enabled it to roll over the roads, as well as swim the seas.

"But even then, granting that the turmoil of Lake Kirdall might be produced by a submarine, brought to a high degree of perfection, there remains as before the question how could it have reached Lake Kirdall? The lake, shut in on all sides by a circle of mountains, is no more accessible to a submarine than to a sea-monster.

"In whatever way this last puzzling question may be solved, the nature of this strange appearance can no longer be disputed since the twentieth of June. On that day, in the afternoon, the schooner "Markel" while speeding with all sails set, came into violent collision with something just below the water level. There was no shoal nor rock near; for the lake in this part is eighty or ninety feet deep. The schooner with both her bow and her side badly broken, ran great danger of sinking. She managed, however, to reach the shore before her decks were completely submerged.

"When the 'Markel' had been pumped out and hauled up on shore, an examination showed that she had received a blow near the bow as if from a powerful ram.

"From this it seems evident that there is actually a submarine boat which darts about beneath the surface of Lake Kirdall with most remarkable rapidity.

"The thing is difficult to explain. Not only is there a question as to how did the submarine get there? But why is it there? Why does it never come to the surface? What reason has its owner for remaining unknown? Are other disasters to be expected from its reckless course?"

The article in the Evening Star closed with this truly striking suggestion: "After the mysterious automobile, came the mysterious boat. Now comes the mysterious submarine.

"Must we conclude that the three engines are due to the genius of the same inventor, and that the three vehicles are in truth but one?"

Chapter 8

AT ANY COST

The suggestion of the Star came like a revelation. It was accepted everywhere. Not only were these three vehicles the work of the same inventor; they were the same machine!

It was not easy to see how the remarkable transformation could be practically accomplished from one means of locomotion to the other. How could an automobile become a boat, and yet more, a submarine? All the machine seemed to lack was the power of flying through the air. Nevertheless, everything that was known of the three different machines, as to their size, their shape, their lack of odor or of steam, and above all their remarkable speed, seemed to imply their identity. The public, grown blase with so many excitements, found in this new marvel a stimulus to reawaken their curiosity.

The newspapers dwelt now chiefly on the importance of the invention. This new engine, whether in one vehicle or three, had given proofs of its power. What amazing proofs! The invention must be bought at any price. The United States government must purchase it at once for the use of the nation. Assuredly, the great European powers would stop at nothing to be beforehand with America, and gain possession of an engine so invaluable for military and naval use. What incalculable advantages would it give to any nation, both on land and sea! Its destructive powers could not even be estimated, until its qualities and limitations were better known. No amount of money would be too great to pay for the secret; America could not put her millions to better use.

But to buy the machine, it was necessary to find the inventor; and there seemed the chief difficulty. In vain was Lake Kirdall searched from end to end. Even its depths were explored with a sounding-line without result. Must it be concluded that the submarine no longer lurked beneath its waters? But in that case, how had the boat gotten away? For that matter, how had it come? An insoluble problem!

The submarine was heard from no more, neither in Lake Kirdall nor elsewhere.