But the situation on the right rear was getting worse and worse. In the evening it was definitely known that Hill 63 had at last fallen after a long and obstinate struggle. The Twenty-fifth, and later the Thirty-fourth Divisions had held up against great odds, but the main force of the enemy was now striking upon that line, and the British were forced to withdraw from Le Bizet towards Nieppe. These German gains enforced a completely new re-arrangement of the forces in the north if they were to avoid being taken in the rear. This change of a wide and far-reaching character was quickly and safely effected during the night of April 11 and 12. It involved moving back the three northern corps into their battle zones, leaving only outposts in advance. They still covered Ypres, but the retirement meant that all that had been won in the mud-and-blood struggle of 1917 had passed into German keeping, and coupled with the loss of Messines it seemed to threaten that the old salient might be renewed in as disastrous a fashion as ever. This retirement was rather in the nature of a precaution against the possibilities of the future. What was of most immediate importance was the withdrawal of the lines which were at such close grips with the enemy to the west of Messines. By the morning of April 12 the general line of the Nineteenth Corps was Steenwerck Station, Pont-d'Achelles, Neuve Eglise, Wulverghem, Wytschaete. No immediate German attack followed on the withdrawal. This abstention on the part of the enemy was due in part to the wonderful work done by a small nest of four machine-guns on the Messines-Wulverghem Road under the command of Lieutenant Hodgson. This small unit had already fought for forty-eight hours, but on this third day of the battle their services were invaluable, for they shot down hundreds of Germans as they endeavoured to debouch from Messines and descend the slope. Save for two wounded men none of this band of heroes ever returned. Among other detachments who behaved with great heroism were a few men of the 5th South Wales Borderers, B Company, under Captain Evans, who maintained themselves at Pick House, north and east of Messines, for three days, until they were at last rescued by the 58th Brigade from the north.

Whilst these fresh dispositions and general retrogressions had been made on this front the Thirty-fourth Division to the south had also been compelled to rearrange its positions. It has already been described how, under cover of the 147th Brigade, they withdrew in absolute order across the Lys. April 11 saw such continued pressure, however on the right of the Twenty-fifth and the whole of the Thirty-fourth Divisions that it became clear early in the afternoon of April 11 that further retirement was imperative. This began at dusk, the three brigades retiring by the Armentières-Bailleul Road, while the 147th still acted as rearguard. They retired through the 74th and 88th Brigades near Bailleul Station, fighting back all the way and considerably harassed by the German guns. On the morning of the 12th the general line was Steam-mill-Bailleul Station-southern border of La Crêche to a point about 500 yards north-east of Pont d'Achelles on the Bailleul Road. Along this line the order of battle from the south was the 147th, 75th, 101st, 74th, 102nd, and 88th Brigades. Nieppe, which had been evacuated, was occupied by the enemy later in the day, and on the evening of April 12 the line was pushed a little farther back to De Seule.

There was no fighting on the new line opposite Messines on April 12, but the battle was, as has been shown, raging furiously elsewhere, and the situation in the south, where the enemy was making progress, must deeply affect that in the north. Had an aviator taken a swift flight from Hollebeke to Givenchy on this day, following the deep curve which had formed in the British line, his observations would have been roughly as follows: in the Hollebeke district he would have found no extreme pressure, and that the Ninth Division, reinforced by the 58th Brigade, was holding the line not far westward of their original position. From there onwards he would have skirted the new line of the Ninth Corps, as already indicated, and would have seen the remains of the Nineteenth Division covering the north of it, the Twenty-fifth Division, also in fragments, about Neuve Eglise, and the Thirty-fourth Division near Steenwerck. He would next observe with consternation or joy according to his colours, that there was a considerable gap before Bailleul. At the other side of this gap he would come upon elements of the Thirty-first and Twenty-ninth Divisions, hard-pressed and worried by the advance which the enemy had made through Merville on their right. He would catch a glimpse also of some thin lines of resistance, still farther south, which represented all that was left of the Fiftieth Division. Finally, he would see the Fifty-first and the Fifty-fifth on the extreme south, both of them standing firm in their positions. Looking eastwards he would see pouring across the Lys the legions of Prince Rupprecht of Bavaria, hurrying to improve their blow, while behind the British lines he would see new divisions, the Fifty-ninth Midlanders at Wulverghem, the Thirty-third near Bailleul, the Sixty-first near Robecq, the 4th Guards Brigade followed by the First Australians near Hazebrouck, all hastening with heavy hearts but the most grim determination to throw themselves across the path of this German invasion which already threatened the most vital points in Flanders. Far to the south also our aviator would perhaps have seen the smoke of many trains, and out at sea might have made out the little dots which marked in the one case French, in the other British, reinforcements. Such was the general panorama upon the Flanders front on the evening of April 12.

CHAPTER X
THE BATTLE OF THE LYS

April 13-May 8

Desperate situation—Sir Douglas Haig's "win or die" message—Epic of the 4th Guards Brigade at Hazebrouck—Arrival of First Australian Division—Splendid services of Thirty-third Division—Loss of Armentières, Bailleul, and Neuve Eglise—The First Division at Givenchy—Fall of Kemmel—Battle of Ridge Wood—Great loss of ground—Equilibrium.

Up to April 13 twenty-eight German divisions had been traced in the battle of Flanders. Since the whole British Army consisted of sixty divisions, and only thirteen had been engaged in Flanders, one can gather how terrible had been their task.

By the fourth day of the battle the purpose of the enemy became more clear. It was evident now that his attack consisted really of three movements. The northern of these, consisting of about six divisions, had for its task to drive through Wytschaete and Messines to Bailleul. At present it was held up in the north by the Ninth Division, but had made its way in the south until Neuve Eglise was the only village which intervened between it and Bailleul. The central attack, consisting of the main force, had taken Armentières and penetrated ten miles deep, capturing Merville, reaching the Clarence River, touching Robecq, and threatening St. Venant. This deep penetration reacted upon the British flanks to north and south of it. Finally, there was an advance by seven or eight divisions in the south, which had been held at Givenchy, but had bent the line back the from that point, Bethune being the immediate objective. The hammering of the Germans was remorseless and terrific. All that the British needed was a little time, but it seemed as if it would be denied them. Help was coming, but it did not arrive so quickly as the new divisions which Von Armin and Von Quast were pouring over the Messines Ridge and across the plain of the Lys.