The British army had taken up its position in high hopes. It was not a British defeat which began the retreat from Mons, and the troops were not well pleased when they were ordered to retire. But the retreat was inevitable, and the most that the British could do was by rearguard actions to put a brake upon the speed of the advancing enemy until such time as they should be able to form up again in the Allied line and assail him. Much depended on their power to gain information concerning the movements of the enemy, so that they might know their own dangers and opportunities. Von Kluck had at first no definite news of the whereabouts of the British army. As late as the 20th of August the German Supreme Command had issued a communication to the German armies stating that 'a disembarkation of British Forces at Boulogne and their employment from the direction of Lille must be taken into account. It is the opinion here, however, that a landing on a big scale has not yet taken place.' General von Zwehl, Commander of the Seventh Reserve Corps, writing in September 1919, tells how the Germans had no reliable information concerning the British expeditionary force. 'It was only on the 22nd of August,' he says, 'that an English cavalry squadron was heard of at Casteau, six miles north-east of Mons, and an aeroplane of the English fifth flying squadron was shot down that had gone up from Maubeuge. The presence of the English in front was thus established, although nothing as regards their strength.' The first news that reached General von Kluck of the presence of the British forces came to him from a British, not from a German, aeroplane.
MAP ILLUSTRATING AERIAL RECONNAISSANCE AREA.
19th TO 24th AUG. 1914
The first aerial reconnaissances by the Royal Flying Corps were carried out on Wednesday, the 19th of August, by Captain P. B. Joubert de la Ferté of No. 3 Squadron, in a Blériot, and Lieutenant G. W. Mapplebeck of No. 4 Squadron, in a B.E. They started at 9.30 a.m., and flew without observers. Captain Joubert de la Ferté was to reconnoitre Nivelles-Genappe in order to report what Belgian forces were in that neighbourhood; Lieutenant Mapplebeck was to find out whether enemy cavalry were still in force in the neighbourhood of Gembloux. The machines were to fly together as far as Nivelles, 'so that if one was obliged to descend the other could report its whereabouts'. The machines lost their way and lost each other. Lieutenant Mapplebeck eventually found himself over a large town which he failed to recognize as Brussels. Later he picked up his position at Ottignies, and soon found Gembloux, where he could see only a small body of cavalry moving in a south-easterly direction. After leaving Gembloux he was enveloped in cloud for some miles, came down to 300 feet over Namur, followed the Sambre, missed Maubeuge, and landed near Le Cateau, whence he flew back to the aerodrome at Maubeuge. He had been away from 9.30 a.m. to 12.0 midday. Captain Joubert de la Ferté, whose machine was slower than Lieutenant Mapplebeck's, attempted to steer by compass through the banks of cloud, and after two hours of wandering landed at Tournai. He made inquiries concerning the Belgian army, but nothing was known of them. He left Tournai at 12.15 p.m., lost his way again, and at 2.0 p.m. landed at Courtrai. Here he was told by the gendarmerie that the headquarters of the Belgian flying corps was at Louvain. He left Courtrai at 3.0 p.m. and passed over Ath, Hal, Braine l'Alleud, Nivelles, returning to Maubeuge at 5.30 p.m. He reported occasional trains in the main stations and pickets on the roads to Brussels.
On the 20th Major C. A. H. Longcroft, with Captain U. J. D. Bourke as observer, reconnoitred as far as Louvain and reported a force of all arms moving south-west through Tervueren, and another force moving into Wavre. They also saw an aerodrome just east of Louvain with seven machines on the ground. Lieutenant E. R. L. Corballis, who, with Captain G. E. Todd, flew over the area Nivelles-Hal-Enghien, reported that there was no sign of troops and that all bridges in the area appeared to be intact. The German flood was spreading but was still some distance away. On the following day (an important day of enemy movements) the weather in the morning was too foggy for observation, and in the afternoon was rainy and misty. Three reconnaissances which were made in the afternoon showed that the country immediately in front of the British was very quiet, but in the wood one mile south of Nivelles Lieutenant Corballis reported a large body of cavalry with some guns and infantry (this was later identified as the German 9th Cavalry Division), and another body of infantry moving south on Charleroi. At Pont-à-Celles on the Charleroi canal, south of Nivelles, three villages were seen to be burning.
On the 22nd there were twelve reconnaissances which revealed the presence of large bodies of troops moving in the direction of the British front, and did much to dissipate the fog of war. The first machine to return came in soon after eleven. This was piloted by Captain G. S. Shephard, with Lieutenant I. M. Bonham-Carter as observer. They had landed at Beaumont (about twelve miles east of Maubeuge) for petrol. Here they were informed that French cavalry had encountered German infantry north of the Sambre canal on the previous afternoon, and had had to fall back. The next machine to return came in at 11.50 a.m. with a wounded observer, Sergeant-Major D. S. Jillings of No. 2 Squadron. He was the first British soldier to be wounded in an aeroplane, and this casualty seemed to bring the German armies nearer than a dozen unmolested reconnaissances could have done. The machine, piloted by Lieutenant M. W. Noel, had come under heavy rifle fire first of all at Ollignies, south-east of Lessines, and then, after passing over a cavalry regiment just south-west of Ghislenghien, had been met with rifle and machine-gun fire. Frequent rifle fire was encountered all the way back to Ath, and just south-east of Ath, over Maffle, Sergeant-Major Jillings had been wounded in the leg by a rifle bullet. Confirmation of the presence of large bodies of enemy in this area came from Captain L. E. O. Charlton flying as observer with Second Lieutenant V. H. N. Wadham. They started at 10.0 a.m. and passed over Charleroi, Gembloux, and Brussels without seeing any large movements, but reported that the northern part of Charleroi and many other towns and villages in that area were burning. From Brussels they went on towards Grammont, and landed at Moerbeke, two miles south-east of Grammont, to make inquiries. Here they received information which hastened their departure. They learnt that a force of 5,000 Germans was in Grammont, that cavalry and cyclists were in Lessines, and that cavalry were expected from Enghien to arrive in Ath that evening. When passing over Bassilly, about half-way between Ath and Enghien, they were fired on by enemy troops which they estimated at the strength of an infantry brigade, and they drew further fire from patrols in Ath. They came in with their information at 1.10 p.m.; Lieutenant W. H. C. Mansfield just before this had reported large bodies moving into Enghien and Soignies. Afternoon reconnaissances added little that was new except that there were cavalry and infantry in the area north of the Mons-Condé canal, and cavalry as far west as Peruwelz.
RECONNAISSANCE REPORT OF LIEUTENANT C. G. G. BAYLY.
To face page 303.
The most important reconnaissance of the day is unfortunately not recorded in the war diary. The value of the report when it came in was recognized at once, and Brigadier-General Sir David Henderson took it personally to General Headquarters. It stated that a long column, whose strength was estimated to be that of an army corps, was moving westward on the Brussels-Ninove road. At Ninove the column continued south-west towards Grammont. This was von Kluck's Second Corps, and the report seemed to show an attempt at an enveloping movement. The same report confirmed what had already been seen, the presence of enemy troops moving along the great Chaussée on Soignies. This column was taking advantage of the trees on either side of the road to shield its movements. This was the first day on which a machine failed to return from over enemy territory. Lieutenants V. Waterfall and C. G. G. Bayly, of No. 5 Squadron, started on a reconnaissance in an Avro at 10.16 a.m. and next day were reported missing. It was the bringing down of this machine, no doubt, which gave the Germans their first assurance of the presence of the British forces. The observer's report, so far as he had written it, was picked up near the wreckage of the machine by some Belgian peasants, and eventually found its way to the War Office in London.