"Not a bit," replied Ross. Without experiencing the faintest sensation of vertigo, he found himself able to lean over the side of the chassis and look down at the scene two thousand feet beneath him.
The sea-plane was rising in a direction diverging obliquely with the coast. She was, in fact, almost over the line of empty transports that looked little bigger than a fleet of toy boats. Farther away could be discerned the Capella and her consorts, moving with apparent slowness upon a perfectly calm sea, for at that altitude the waves were merged into a flat surface. Small splashes of white—the spray thrown up by falling shells—could be seen all around the patrol-vessels, which, in obedience to a signal, had now taken up a position rather nearer to the monitors.
Presently the Flight-Sub, having gained the desired altitude, moved the steering-plane ever so slightly. Quickly the machine answered her helm, swinging round until she pointed towards the land.
Three minutes later Ross found himself immediately above the British monitors. The sea-plane was now pitching slightly in the disturbed air, for the concussion of the heavy weapons was distinctly felt even at seven hundred yards above the bombarding ships. Although the roar of the concerted cannonade was deafening, Ross heard not a sound of it. To all intents, as far as he was concerned, the guns might have been fired with silencers attached to their muzzles. The whirr of the sea-plane's motor and the rush of air past his ears out-voiced every other sound.
Five miles beyond the line of monitors, could be discerned the Belgian coast, composed for the most part of undulating sand-dunes dotted with clusters of buildings.
As the sea-plane approached the land Ross could, with the aid of his binoculars, distinguish other objects—wavy lines, dotted with ant-like figures bunched together round something that looked like stumps of a lead pencil. The lines were the German trenches, the "ants" grey-coated artillerymen, and the "stumps" the heavy howitzers.
"That's our pigeon!" spoke the Flight-Sub through the telephone. "The battery a hundred yards to the north of that ruined church tower. Our fellows haven't knocked it out yet. Wireless them; fifty yards over."
Ross sent the desired information. The sea-plane, having flown over its objective, turned, describing an elongated figure eight. As she swung round, Ross noticed a mushroom-like cloud of white smoke a short distance beneath, and to the left of the fuselage. Then another a hundred feet immediately in front. At each "mushroom" the sea-plane curtsied. Something zipped close to the lad's ear. A wire snapped, the severed portions circling themselves into erratic spirals. A fragment of fabric from one of the main planes flew past him, like a scrap of tissue-paper in the grip of a boisterous wind.
Then Ross tumbled to it. Those silent mushrooms of smoke were shrapnel shells bursting unpleasantly close. For a moment, the young observer felt himself seized by an almost irresistible impulse to take refuge under the coaming surrounding his seat. He uttered an involuntary exclamation of unwelcome surprise.
"What's up?" asked a voice in his ear. It was the Flight-Sub, to whom the telephone had transmitted Ross's exclamation.