Whilst these stirring events had taken place on the right flank, there had been heavy fighting also on the left. Here the British defence had been based upon two small but strong forts, called Cailloux North and Route A Keep. The latter fell early in the action, the German infantry coming upon it so unexpectedly in the fog that the machine-guns were at the moment mounted upon the parapet and elevated for indirect fire. They were put out of action, and the place was surrounded and taken. This greatly weakened the left wing of the defence. Farther still to the left the Germans were pushing through Loisne, and the fort called Loisne Central was heavily engaged. This portion of the line was held by the 166th Brigade. Once the German wave actually lapped over into the little fort, but the place was not taken, and its machine-guns still clattered and flashed. All day the Germans were held at this point though the pressure was great. During the night the 13th King's Liverpools from the 9th Brigade were sent as a reserve to the weary line. At 7.40 on the morning of April 10 the enemy, under cover of a murderous barrage, attacked Loisne once more, striving hard to break in the left of the British defence. The garrison suffered terribly, but none the less the stormers were shot back into their shell-holes and lurking-places. Two successive attacks on the forts of Cailloux and Festubert had no better success and were less strongly urged. At seven in the evening they again, with a sudden rush, got a footing in the fort of Loisnes, and again were driven out, save for twenty-one who remained as prisoners. Another day had passed, and still Lancashire stood fast and the lines were safe. On April 11 the whole position {234} was swept by a heavy shell-storm, and the German infantry clustered thickly in front of the crumbling barricades. The guns both of the Fifty-fifth and of the Eleventh Division played havoc with them as they assembled, so that the attack was paralysed on the right, but on the left the two little forts of Festubert East and Cailloux were both overwhelmed. The former, however, was at once retaken by a mixed storming party from the 5th and 13th King's Liverpools. Late in the evening Cailloux Keep was also stormed, and once more the position was intact.