When England's great enemy demanded the Formula of the Fleets, Ulster's brain refused to receive his meaning. The naval airship of the period carried no stored force, but the power driving her engines was flashed to her through space from the nearest fortified station of the Admiralty. Each station gave its ships a power-field extending two thousand miles in all directions. Thus the Home station was a fortified position in the coal measures of Staffordshire. Groups of stations covered Canada, the West Indies, and South America; South Africa was in the power-field of the Victoria Falls, Central Africa was controlled from the White Nile, West Africa from the Niger Valley. Another chain of power-fields centred in the Ocean Fortresses: Gibraltar, Malta, Alexandria, Aden, Colombo, Rangoon, Singapore, Hong Kong. From the Arctic regions to the Antarctic ice, no corner of the world was secured from the visitation of our fleets. To debar foreign navies from using our stores of power, each ship had her engines keyed to an exact adjustment known as the Formula of the Fleets. Given that formula, a foreign ship could traverse the whole planet. The British Empire and the United States used one formula, entrusted only to the Chancellor, the President, and the Adjusters-General, and one can readily understand that this key of space conferred most awful powers. And were the formula changed without due warning, every ship afloat would be plunged through space to destruction. "The Formula of the Fleets," Ulster repeated vaguely. "You!" Then he seemed to awake. "You devil!" he cried furiously. "No!" He choked, he could find no utterance, but wrung his hands, and, starting to his feet, shook his arms upward at the heavens. Then he saw the Emperor's cold face between the lamplight and the moonlight smiling, and at the sight drew back. A strangled sob broke from him. "I am trapped, shamed, broken; I have sinned, but still I am an Englishman, and all my years are given to England's service!" The Chancellor had back his dignity and a new courage. "The claims of the Russian ambassador insult this nation; the proposals of that drunken and disgusting beast, your brother, insult my sovereign; the demand for the Formula of the Fleets is a deadly insult to myself. You have forfeited all claims to treatment as a sovereign; but such claims as you have presumed to make to me, I shall lay before my colleagues, before the Empire, and before the world. As to your charges against me, they come not from a friendly prince, but from an enemy too base even for the courtesies of war. Our people will not see the sin of the Chancellor in this crime of Russia." The Emperor's cruel eyes glittered, the moonlight caught a gleam from his teeth.