Against the violent wind, far stronger than we found it near the ground, we make laboured progress. Evidently, two of the formation are in difficulties, for they drop farther and farther behind. Soon one gives in and turns back, the pilot being unable to maintain pressure for his petrol supply. I shout the news through the speaking-tube, and hear, in reply from the flight-commander, a muffled comment, which might be "Well!" but it is more likely to be something else. Three minutes later the second bus in trouble turns tail. Its engine has been missing on one cylinder since the start, and is not in a fit state for a trip over enemy country. Again I call to the leader, and again hear a word ending in "ell." The two remaining machines close up, and we continue. Very suddenly one of them drops out, with a rocker-arm gone. Its nose goes down, and it glides into the clouds. Yet again I call the flight-commander's attention to our dwindling numbers, and this time I cannot mistake the single-syllabled reply. It is a full-throated "Hell!"

For my part I compare the party to the ten little nigger boys, and wonder when the only survivor, apart from our own machine, will leave. I look towards it anxiously. The wings on one side are much lighter than those on the other, and I therefore recognise it as the Tripehound's bus. There is ground for misgiving, for on several occasions during the past ten minutes it has seemed to fly in an erratic manner. The cause of this, as we find out on our return, is that for five minutes the Tripehound has been leaning over the side, with the joystick held between his knees while attempting to fasten a small door in the cowling round the engine, left open by a careless mechanic. It is important to shut the opening, as otherwise the wind may rush inside and tear off the cowling. Just as a short band of the trench line south of Arras can be seen through a gap, the Tripehound, having found that he cannot possibly reach far enough to close the protruding door, signals that he must go home.

I do not feel altogether sorry to see our last companion leave, as we have often been told not to cross the lines on a reconnaissance flight with less than three machines; and with the wind and the low clouds, which now form an opaque window, perforated here and there by small holes, a long observation journey over Bocheland by a single aeroplane does not seem worth while. But the flight-commander, remembering the recent order about completing a reconnaissance at all costs, thinks differently and decides to go on. To get our bearings he holds down the nose of the machine until we have descended beneath the clouds, and into full view of the open country.

We find ourselves a mile or two beyond Arras. As soon as the bus appears it is bracketed in front, behind, and on both sides by black shell-bursts. We swerve aside, but more shells quickly follow. The shooting is particularly good, for the Archie people have the exact range of the low clouds slightly above us. Three times we hear the hiss of flying fragments of high explosive, and the lower left plane is unevenly punctured. We lose height for a second to gather speed, and then, to my relief, the pilot zooms up to a cloud. Although the gunners can no longer see their target, they loose off a few more rounds and trust to luck that a stray shell may find us. These bursts are mostly far wide of the mark, although two of them make ugly black blotches against the whiteness of the vapour through which we are rising.

Once more we emerge into the open space between sky and cloud. The flight-commander takes the mouthpiece of his telephone tube and shouts to me that he intends completing the round above the clouds. To let me search for railway and other traffic he will descend into view of the ground at the most important points. He now sets a compass course for Toutprès, the first large town of the reconnaissance, while I search all around for possible enemies. At present the sky is clear, but at any minute enemy police craft may appear from the unbroken blue or rise through the clouds.

The slowness of our ground speed, due to the fierce wind, allows me plenty of time to admire the strangely beautiful surroundings. Above is the inverted bowl of blue, bright for the most part, but duller towards the horizon-rim. The sun pours down a vivid light, which spreads quicksilver iridescence over the cloud-tops. Below is the cloud-scape, fantastic and far-stretching. The shadow of our machine is surrounded by a halo of sunshine as it darts along the irregular white surface. The clouds dip, climb, twist, and flatten into every conceivable shape. Thrown together as they never could be on solid earth are outlines of the wildest and tamest features of a world unspoiled by battlefield, brick towns, ruins, or other ulcers on the face of nature. Jagged mountains, forests, dainty hills, waterfalls, heavy seas, plateaux, precipices, quiet lakes, rolling plains, caverns, chasms, and dead deserts merge into one another, all in a uniform white, as though wrapped in cotton wool and laid out for inspection in haphazard continuity. And yet, for all its mad irregularity, the cloud-scape from above is perfectly harmonious and never tiring. One wants to land on the clean surface and explore the jungled continent. Sometimes, when passing a high projection, the impulse comes to lean over and grab a handful of the fleecy covering.

After being shut off from the ground for a quarter of an hour, we are able to look down through a large chasm. Two parallel canals cut across it, and these we take to be part of the canal junction below Toutprès. This agrees with our estimate of speed, wind, and time, according to which we should be near the town. The pilot takes the machine through the clouds, and we descend a few hundred feet below them.

To disconcert Archie we travel in zigzags, while I search for items of interest. A train is moving south, and another is entering Toutprès from the east. A few barges are dotted among the various canals. Bordering a wood to the west is an aerodrome. About a dozen aeroplanes are in line on the ground, but the air above it is empty of Boche craft.

Evidently the Huns below had not expected a visit from hostile machines on such a day, for Archie allows several minutes to pass before introducing himself. A black puff then appears on our level some distance ahead. We change direction, but the gunners find our new position and send bursts all round the bus. The single wouff of the first shot has become a jerky chorus that swells or dwindles according to the number of shells and their nearness.

I signal to the flight-commander that I have finished with Toutprès, whereupon we climb into the clouds and comparative safety. We rise above the white intangibility and steer north-east, in the direction of Passementerie. I continue to look for possible aggressors. The necessity for a careful look-out is shown when a group of black specks appears away to the south, some fifteen hundred feet above us. In this area and under to-day's weather conditions, the odds are a hundred to one that they will prove to be Boches.