The 98th Brigade was on the left of the 100th, filling up the gap to Bazentin village. They had extended their right in order to help their sorely-tried comrades, and they had themselves advanced upon the line of the Switch Trench--the 1st Middlesex leading, with the 4th Suffolk in support. The 2nd Argyll and Sutherlands with the 4th King's Liverpool were in reserve. They got well forward, but ceased their advance when it was found that no progress could be made upon the right. Thus, for the time, the division was brought to a stand. That night the 19th Brigade relieved the 100th, which had been very hard hit in this action. After the change the 1st Scottish Rifles and the 20th Royal Fusiliers formed the front line of the 19th Brigade, the Rifles in touch with the 22nd Brigade of the 7th upon their right, while the Fusiliers were in touch with the 98th Brigade upon their left. The general situation did not admit of an immediate attack, and the Germans took advantage of the pause to strengthen and slightly to advance their position. On July 17 the hard-worked Twenty-first Division upon the left was drawn out, and both the Thirty-third and Seventh had to extend their fronts. On the other hand, the First Division came in upon the left and occupied a portion of the Bazentin-le-Petit Wood. The position at that time was {165} roughly that the Seventh Division covered the front from High Wood to Bazentin Grand, the Thirty-third Division from Bazentin Grand to Bazentin Petit, and the First was from their left to Pozières. Upon July 18 there was a very heavy German attack upon Delville Wood, which is treated elsewhere. This was accompanied by a severe barrage fire upon the Bazentins and upon Mametz Wood, which continued all day. That night the Nineteenth Division came into line, taking over Bazentin Petit, both village and wood. The Thirty-third Division moved to the right and took some pressure off the Seventh, which had done such long and arduous service. These incessant changes may seem wearisome to the reader, but without a careful record of them the operations would become chaos to any one who endeavoured to follow them in detail. It is to be emphasised that though divisions continually changed, the corps to which they temporarily belonged did not change, or only at long intervals, so that when you are within its area you can always rely upon it that in this particular case Horne of the Fifteenth Corps is the actual brain which has the immediate control of the battle.