It appears to me most important. I even hope it may prove the means of tracking this strange personage."

"That is what I also hope, Mr. Ward."

"Only what connection can possibly exist between the 'Terror' and the Great Eyrie?"

"That I do not know. I cannot even imagine."

"There can be but one explanation," continued Mr. Ward, "though it is almost inadmissible, even impossible."

"And that is?"

"That the Great Eyrie was the spot selected by the inventor, where he gathered his material."

"That is impossible!" cried I. "In what way would he get his material in there? And how get his machine out? After what I have seen, Mr. Ward, your suggestion is impossible."

"Unless, Strock--"

"Unless what?" I demanded.

"Unless the machine of this Master of the World has also wings, which permit it to take refuge in the Great Eyrie."

At the suggestion that the "Terror," which had searched the deeps of the sea, might be capable also of rivaling the vultures and the eagles, I could not restrain an expressive shrug of incredulity. Neither did Mr. Ward himself dwell upon the extravagant hypothesis.

He took the two letters and compared them afresh. He examined them under a microscope, especially the signatures, and established their perfect identity. Not only the same hand, but the same pen had written them.

After some moments of further reflection, Mr. Ward said, "I will keep your letter, Strock. Decidedly, I think, that you are fated to play an important part in this strange affair or rather in these two affairs. What thread attaches them, I cannot yet see; but I am sure the thread exists. You have been connected with the first, and it will not be surprising if you have a large part in the second."

"I hope so, Mr. Ward. You know how inquisitive I am."

"I do, Strock. That is understood. Now, I can only repeat my former order; hold yourself in readiness to leave Washington at a moment's warning."

All that day, the public excitement caused by the defiant letter mounted steadily higher. It was felt both at the White House and at the Capitol that public opinion absolutely demanded some action. Of course, it was difficult to do anything. Where could one find this Master of the World? And even if he were discovered, how could he be captured? He had at his disposal not only the powers he had displayed, but apparently still greater resources as yet unknown. How had he been able to reach Lake Kirdall over the rocks; and how had he escaped from it? Then, if he had indeed appeared on Lake Superior, how had he covered all the intervening territory unseen?

What a bewildering affair it was altogether! This, of course, made it all the more important to get to the bottom of it. Since the millions of dollars had been refused, force must be employed. The inventor and his invention were not to be bought. And in what haughty and menacing terms he had couched his refusal! So be it! He must be treated as an enemy of society, against whom all means became justified, that he might be deprived of his power to injure others. The idea that he had perished was now entirely discarded. He was alive, very much alive; and his existence constituted a perpetual public danger!

Influenced by these ideas, the government issued the following proclamation:

"Since the commander of the 'Terror' has refused to make public his invention, at any price whatever, since the use which he makes of his machine constitutes a public menace, against which it is impossible to guard, the said commander of the 'Terror' is hereby placed beyond the protection of the law. Any measures taken in the effort to capture or destroy either him or his machine will be approved and rewarded."

It was a declaration of war, war to the death against this "Master of the World" who thought to threaten and defy an entire nation, the American nation!

Before the day was over, various rewards of large amounts were promised to anyone who revealed the hiding place of this dangerous inventor, to anyone who could identify him, and to anyone who should rid the country of him.