The fog was so dense and the communications so precarious that the officers in charge of the operations had the nerve-trying experience of seeing their whole force vanish into the gloom and knowing nothing of what had become of them, save that the deafening roar of guns told of a deadly struggle. Soon there came news of disasters to the tanks. Three drove into a morass and were embedded there. Two developed engine trouble and collapsed. One never got across. The others lost their place in the fog and all hope of useful co-operation with the infantry was at an end. Then came belated news of the storm troops. The leading battalions of the Fiftieth Division had got across in safety but had been swallowed up in the fog, shrouding several German posts containing machine-guns, which opened on the supports after the front files had passed them. {189} On the left the formidable obstacle of the station with its heavy loop-holed out-buildings held up the flank battalion of the 151st Brigade, and the whole advance was stopped and greatly disorganised at this point. The railway was a strong line of German resistance, and especially a wooded mound on its eastern side, which bristled with guns. The attack being held, the reserve of the Fiftieth Division, the 150th Brigade, was thrown into the fight which in the early afternoon was still in a condition of equilibrium. In the meanwhile a great deed of arms had been wrought in the northern part of the line. Tanner's South African Brigade, having reached the eastern bank of the river, had penetrated the German wire and stormed through the fog up the hill on the north of the town. The second wave was held by the concentrated fire, and the first wave was so utterly lost that the patrols could find no trace of where it had got to. Just as all hope had been given up, and it had been arranged to restart the barrage, a brave runner got through with the news that the leading South Africans were right through the town and engaged in a desperate hand-to-hand fight in the deep cutting on the farther side. In order to reach this place they had been compelled to force their way through another broad apron of untouched wire, a most remarkable achievement. Gradually the very strenuous German resistance was overcome, small bodies of South Africans dribbling up in support of their comrades. By noon this part of the German line had fallen, with a corresponding weakening along the rest of their front, for the bravest man is less brave when he begins to think that the {190} day is already lost and that his self-sacrifice is manifestly vain.