Attack on X line at zero. Attack on Xa line at zero + 1 hour. (This second assault is limited to 1st Guards Brigade. 2nd Guards Brigade will not move till time for third assault.) Attack on Y line at zero + 2 hours. Attack on Z line at zero + 4 hours and 30 minutes. 11. The action of the waves of attack will be as follows: (_a_) First four waves will pass over X line and lie down close in rear of the barrage, which will halt till zero + 1 hour and 10 minutes at X + 200 yards. Fifth and sixth waves will clear up X line. Seventh and eighth waves will clear up X line and lie down in rear of fourth wave. Ninth wave will lie down short of X line. (_b_) At zero + 2 hours all waves will advance to the Y line. Seventh and eighth waves will advance in front of fifth and sixth waves. Ninth wave will be in rear as before. (_c_) On reaching Y line, first four waves will pass over Y line and lie down close in rear of barrage as before. Seventh and eighth waves will clear up Y line. Fifth and sixth waves will pass over Y line and lie down in rear of fourth wave. Ninth wave will lie down short of Y line. (_d_) Half an hour after reaching Y line all Commanding Officers will meet at Battalion Headquarters of 3rd Bn. Grenadier Guards, and will confer on attack on Z line. Lieutenant-Colonel Brooke, D.S.O., 3rd Bn. Grenadier Guards, if present, will command the attack on the Y line. In the absence of Lieut.-Colonel Brooke, senior officer present will command. Stokes Gun Sections will act in accordance with orders of O.C. attack. 12. It is the object of these dispositions to ensure a steady flow of troops so as to press the strongest possible attack against each successive objective. Rear lines will reinforce leading lines wherever they appear thin. No troops will be left in any objective when the attack goes on. The task of the two leading Guards Brigades is to drive the attack through Lesbœufs to the ultimate objective by every means in their power. 3rd Guards Brigade will be in close reserve to carry out any of the following duties, as may be required: (_a_) To pass through Z and press the attack behind the cavalry. (_b_) To make a defensive flank, if the attack on our flanks is held up. (_c_) To support the attack of the leading Guards Brigades, if held up anywhere. 13. 76th Field Company, R.E., will be in Brigade Reserve. It will be formed up in a place to be notified later, and will await orders from the Brigade. 14. Ninth Squadron, R.F.C., will have two contact aeroplanes in the air from zero to dark on Z day, and again from 6.30 A.M. to 9 A.M. on Z + 1 day. Flares will be lit as follows: