It was a frightful catastrophe, and a shiver of horror passed through the land. But it was nothing to what was to follow. In the late fall of that year Emil Gluck made a clean sweep of the Atlantic seaboard from Maine to Florida. Nothing escaped. Forts, mines, coast defences of all sorts, torpedo stations, magazines—everything went up. Three months afterward, in midwinter, he smote the north shore of the Mediterranean from Gibraltar to Greece in the same stupefying manner. A wail went up from the nations. It was clear that human agency was behind all this destruction, and it was equally clear, through Emil Gluck’s impartiality, that the destruction was not the work of any particular nation. One thing was patent, namely, that whoever was the human behind it all, that human was a menace to the world. No nation was safe. There was no defence against this unknown and all-powerful foe. Warfare was futile—nay, not merely futile but itself the very essence of the peril. For a twelve-month the manufacture of powder ceased, and all soldiers and sailors were withdrawn from all fortifications and war vessels. And even a world-disarmament was seriously considered at the Convention of the Powers, held at The Hague at that time. And then Silas Bannerman, a secret service agent of the United States, leaped into world-fame by arresting Emil Gluck. At first Bannerman was laughed at, but he had prepared his case well, and in a few weeks the most sceptical were convinced of Emil Gluck’s guilt. The one thing, however, that Silas Bannerman never succeeded in explaining, even to his own satisfaction, was how first he came to connect Gluck with the atrocious crimes. It is true, Bannerman was in Vallejo, on secret government business, at the time of the destruction of Mare Island; and it is true that on the streets of Vallejo Emil Gluck was pointed out to him as a queer crank; but no impression was made at the time. It was not until afterward, when on a vacation in the Rocky Mountains and when reading the first published reports of the destruction along the Atlantic Coast, that suddenly Bannerman thought of Emil Gluck. And on the instant there flashed into his mind the connection between Gluck and the destruction. It was only an hypothesis, but it was sufficient. The great thing was the conception of the hypothesis, in itself an act of unconscious cerebration—a thing as unaccountable as the flashing, for instance, into Newton’s mind of the principle of gravitation.