Reverting now to the general situation upon March 27, the weak point was north and south of the Somme to the south of Albert. Between the river and Harbonnière the left wing of the Fifth Army had been broken, as will be told when we come to consider the operations in that area. The German advance was pouring down the line of the river with the same fierce rapidity with which it had recently thundered forward over the old Somme battle-fields. Having annihilated the local resistance on the left bank of the river, where Colonel Horn and 400 nondescripts did all that they could, they were pushing on from Cerisy to Corbie. General Watts of the Nineteenth Corps, whose defence was one of the outstanding features of the whole operations, was hard put to it to cover his left wing, so in loyal co-operation the Third Army north of the river detached the hard-worked Cavalry Corps, who were always called upon at moments of supreme crisis, and who never failed to answer the call. It was actually engaged to the north of the river at the time, but disengaged itself in part, though the enemy was holding Cerisy and Chipilly and had got a bridge across the river which would enable them to get to the rear of General Watts' Corps. The means by which this very dangerous German move was kept within bounds comes within the history of the Fifth Army. Suffice it to say that the cavalry passed over the river and that the Seventh Corps, north of the river, extended to cover the {74} wider front, throwing out a defensive flank along the north bank from Sailly-le-Sec to Aubigny. Along the whole line to the north the pressure was great all day upon March 27, but the attacks upon the Fourth Corps, which were particularly severe, were repulsed with great loss at Beaumont Hamel, Bucquoy, north of Puisieux, and at Ablainzeville. Near Bucquoy the Sixty-second Division in these two days repelled, as already narrated, eight separate German attacks. This fighting has to be fitted in with that recounted in the previous chapter near Ayette, in connection with the Thirty-first Division, in order to get a complete view of the whole German effort and the unbroken British line. Hamel was the only fresh village to the north of Albert which was taken by the Germans that day. [Sidenote: Fourth and Fifth Corps. March 21.] March 28 was remarkable for the very desperate engagement upon the front of the Sixth and Seventeenth Corps, which has been already described, and which marked the limit of the whole German advance in the northern area. The Fourth Corps farther south had its own share of the fighting, however, as already told in connection with the defence of Bucquoy by the Sixty-second Division. The line was held, however, and save for a small strip of Rossignol Wood, no gain at all came to solace the Germans for very heavy losses.