It seemed, indeed, that to pass them was hopeless, since the air-forts, hanging above the great layer of misty vapor that stretched beneath, could instantly detect with those mighty beams any cruisers passing above them, at whatever height, and could blast them from the air with their gigantic batteries of heat-guns. To pass beneath the great vapor-layer was as impossible, since the air-fort chain which the European Federation put forth here in war-time was a double one, and its second line hung, farther eastward a little, beneath the vapor area, watching with its own great beams and guns for any ships passing there. There remained but one alternative, to pass through the thick mists of the vapor-layer itself, but that, though concealing us from the guns of air-forts above and beneath, would be in itself suicide, since such vapor-layers between the forts were invariably filled in war-time with floating air-mines, great cube-like metal containers held aloft and motionless by their own electrostatic-motors and tube-propellers and which contained a terrific heat-charge which was instantly released upon any luckless ship that touched them.
But now as our ships slowed at sight of the ominous fingers of light far ahead I spoke quickly into the distance-phone. "Our one chance is to go through the vapor-layer," I said, "and use our cruiser-finders to avoid the air-mines. By going through in a three-ship column we may be able to make it."
At my order therefore our great triangle of cruisers shifted its formation abruptly into one of a long slender line, three ships in width, and then that line with my own cruiser at its head was slanting sharply downward toward the great mists beneath us. A moment more and our cruisers had entered those mists, were moving forward enveloped in them, the great vapor-layer through which we moved hiding all things from about us, hiding our cruisers even from each other. But though we could not see them, we knew that the great air-forts hovered ahead and above us, now, and that the vapor-layer into which we were moving was one sown thick with the deadly air-mines. So, with Macklin at the cruiser's wheel guiding it slowly forward at the head of our column of ships, holding a course eastward through the mists by the compass and creeping forward now at the same low speed as the ships behind, I ordered Hilliard, beneath, to swing out the cone-like cruiser-finders from our ship's sides, and to report instantly any air-mines they detected before us.
Behind us, too, the cruisers that followed were using their own cruiser-finders as they crept through the mists after us, at my order; for though as leading ship we could report to them all air-mines which we encountered before us, it was necessary for the cruisers behind to feel their way forward independently, since in the concealing mists they could not follow exactly upon our own ship's track. Now, though, listening intently at the order-phone, I waited Hilliard's reports. And in moments more, as our cruiser-finders' coils picked up the hum of the enemy's electrostatic-motors a little ahead and to the right, he reported sharply and I repeated the information swiftly to Macklin, who instantly swung our ship a little to the left. And still Hilliard remained with the cruiser-finders, whose super-sensitive coils caught instantly the electrostatic-motors of the air-mines before and about us.
Onward thus we crept, Hilliard reporting at intervals of every few moments as an air-mine was picked up ahead, while at my swift repetition of his report Macklin would swerve our ship to avoid it. Behind our own craft, we knew, all the scores of our cruisers were creeping forward through the great vapor-layer in the same manner. Now we could plainly hear the great, unceasing drone of the mighty air-forts above, as we crept through the vapor-layer beneath them, and knew that were we to emerge into any chance opening in the thick mists about us we would have but short shrift enough from the giant guns of those forts overhead. Yet still we crept on, praying that none of our cruisers struck the deadly mines, since a single one striking would loose a great flare of heat and light from the bursting air-mine that would betray us all. Even our own ship, as it swerved from an air-mine that Hilliard had hastily reported, almost ran full onto another one in the opposite direction, a great cube of metal, holding within it a hell of condensed heat and death and suspended by its power gained from the concentrated cosmic trap. And though Macklin whirled our cruiser aside in time to graze by it it seemed impossible that all our ships could feel through this field of death without disaster.
Yet still we were creeping onward, through the thick mists, and now the great air-forts' drone came from behind and above us, as we passed on beneath them. On and on, feeling blindly forward through that zone of potential death we went, over the second chain of air-forts whose motors' sound came up to us muffled through the mists, and then that too was dropping behind us. For some moments, though, we continued to feel forward in the vapor-layer, and then I had given the ships behind the order to rise and at once, as carefully as ever, our cruisers were feeling their way upward until they emerged at last into the open air above the mists, a tight steel hand seeming to unclose from about my heart as we came up from out that terrible zone of death into the dim starlight of the upper night, the white beams of the upper air-forts now far behind us.
On to Berlin
"Through at last!" I cried to Macklin, as we drove upward. "It seems incredible that all our ships could have won through that mine-field!"
Macklin nodded. "We'd not have made it had the air-forts there been using their own cruiser-finders," he said. "But they never dreamed that any ships would try to get through the mine-sown mists, evidently."