It was nearly an hour before he came on deck again, and by this time the Ithuriel, constantly moving to and fro over London, so that any change in the course of events could be at once reported to Natas, had shifted her position to the southward, and was hanging in the air over Sydenham Hill, the headquarters of General le Gallifet, whence could be plainly heard the roar of the tide of battle as it rolled ever northward over the hills of Surrey.
An air-ship came speeding up from the southward as he reached the deck. He signalled to it to come alongside. It proved to be the Mercury taking a message from Tremayne, who was personally commanding the Army of the South in the Ariel, to the air-ships operating with the Army of the North.
"What is the message?" asked Arnold.
"To engage and destroy the remaining Russian war-balloons, and then come south at once," replied the captain of the Mercury. "I am sorry to say both the Lucifer and the Azrael have been disabled by chance shots striking their propellers. The Lucifer was so badly injured that she fell to the earth, and blew up with a perfectly awful explosion; but the Azrael can still use her fan-wheels and stern propeller, though her air-planes are badly broken and twisted."
Arnold frowned at the bad news, but took no further notice of it beyond saying—
"That is unfortunate; but, I suppose, some casualties were inevitable under the circumstances." Then he added: "I have already destroyed all that were left of the Tsar's war-balloons, but you can take the other part of the message. Where is the Ariel to be found?"
The captain of the Mercury gave him the necessary directions, and the two air-ships parted. Within an hour a council of war, consisting of Natas, Arnold, and Tremayne, was being held in the saloon of the Ithuriel, on the issue of which the lives of more than two millions of men depended.
CHAPTER XLVI.
VICTORY.
