The crisis of the battle of Ypres came on the 31st of October, when the line of the First Division was broken and the left flank of the Seventh Division exposed, at Gheluvelt, some six miles east of Ypres. The counter-attack by the First Guards Brigade and the famous bayonet charge of the Second Worcestershire Regiment retook Gheluvelt, and re-established the line. The last act of the long agony came on the 11th of November, when a great attack was delivered all along the line. The place of honour on the Ypres-Menin road was given to two brigades of the Prussian Guard Corps, who had been brought up from Arras for the purpose. The First Division of the British army met this attack at its heaviest point of impact, and by the close of the day the Prussians had gained five hundred yards of ground at the cost of enormous losses. The story of the battle belongs to military history; the loss and profit account can be summarized in two facts. The First Brigade, which met the Prussian spearhead, was taken back into reserve on the following day. It had gone into the battle four thousand five hundred strong; on the 12th of November there remained, of the First Scots Guards, one officer and sixty-nine men; of the Black Watch, one officer and a hundred and nine men; of the Cameron Highlanders, three officers and a hundred and forty men; of the First Coldstream Guards, no officers and a hundred and fifty men. This is not a list of the surrendered remnant of an army: it is a list of some of the victors of Ypres. The other fact is no less significant; after a week of fighting the German attack fainted and died, and when the next great assault upon the Ypres salient was delivered, in April 1915, it was led not by the Prussian Guard but by clouds of poison-gas. No extraordinary or signal services were rendered by the Flying Corps during the crises of the battle. The weather was bad, and on some days flying was impossible. Yet by every flight knowledge was increased. When the British troops arrived in Flanders and were sent at once into the battle, the country in front of them was unknown. The dispositions of the enemy forces were not even guessed at. Then by the aid of the Flying Corps the enemy's batteries were mapped out, his trench lines observed and noted, his railheads and his roads watched for signs of movement. The reports received just before the battle do not, it is true, indicate the whole volume of movement that was coming towards the Ypres area. The newly raised reserve corps which formed part of the German Fourth Army, the transport of which to the western front began on the 10th of October, were not definitely seen from the air until just before the battle. But observers' reports did indicate that many troops were moving on the Ypres front, and once battle was joined enemy movements were fully reported on.