over from Rawlinson to Gough on 15 July, making the Albert–Bapaume Road the boundary between the two armies. When Fourth Army's attacks again ran out of steam, Haig ordered Gough (18 July) to prepare for "methodical operations against Pozières ... with as little delay as possible", to capture the summit of Thiepval Ridge and cover the left flank of Fourth Army's advance. Haig sent some fresh divisions to X Corps and also deployed 1 ANZAC Corps, newly arrived on the Western Front, opposite Pozières. This was the most important attack yet expected of Gough. Gough had to be dissuaded from launching 1st Australian Division against Pozières at 24 hours notice. Charles Bean, the Australian Official Historian, later wrote that on 18 July Maj-Gen "Hooky" Walker, the British officer commanding 1st Australian Division, had been ordered to attack Pozières the following night. Walker was appalled by these "scrappy & unsatisfactory orders from Reserve Army", later recording in his diary his concerns that he would be "rushed into an ill-prepared ... operation". I ANZAC Corps HQ had not yet arrived on the Somme and Walker, with "the sweat on (his) brow", argued with Gough, as did his chief of staff Brudenell White, until Gough gave in. Walker later wrote (in 1928) that the incident was "the very worst exhibition of Army commandship that occurred during the whole campaign, though God knows the 5th Army [as Reserve Army was later designated] was a tragedy throughout". Walker later wrote of how he had had to demand extra artillery, and only obtained permission to attack from the south east rather than the south west (the direction of previous unsuccessful attacks) as Gough wanted after taking Edward "Moses" Beddington, a staff officer whom Gough trusted, with him to reconnoitre the position. Haig advised Gough (20 July) to "go into all the difficulties carefully", as that division had not fought in France before. Gough defended the ANZACs to Haig against "tittle-tattle" at GHQ by officers who had "no idea of the real worth of the Australians". Gough later claimed (letter to Edmonds in 1939) he had given Walker no choice but had himself ordered the change in the direction of the attack. The attack was delayed until 12:30 am on the night of 22/23 July and Pozières was taken, partly as a result of planning and partly as tired German troops were in the process of being