fire" and "the thing is to advance along a wide front, step by step to very limited and moderate objectives, and to forbid going beyond those objectives until all have been reached by the troops engaged", and urging Kiggell "not to show this letter to anyone". In the same letter he wrote: "Before the war our theory was that anybody who could make ground should make it. This is a dangerous theory until we get through the enemy’s trenches". Kiggell replied to the CIGS on the evening of 14 July. He conceded that there had been problems with infantry-artillery coordination, but seemed more concerned with the slowness of progress, anticipating that the commanders might be criticised by future Staff College lecturers for not pushing on fast enough, but insisting that "the Bosch was badly rattled on a good part of our front". Possibly (in David Woodward’s view) worried at Kiggell’s response, Robertson wrote to Rawlinson, GOC Fourth Army, on 26 July urging him not to let the Germans "beat you in having the better man-power policy" and urging "common-sense, careful methods, and not to be too hide-bound by the books we used to study before the war". In the same letter he wrote that "[Field Service Regulations] will require a tremendous amount of revising when we have finished with the Boche" and urged him not to take the principles of FSR too literally, adding "I think you know what is in my mind", a phrase which Tim Travers believes refers to Robertson's preference for more cautious tactics. Henry Wilson recorded rumours that Robertson was angling for Haig's job in July, although there is no clear evidence that this was so. This was the month with the highest British casualties of the entire war, at a time when the German Verdun Offensive was already being scaled back. Haig was reluctant to send Robertson full weekly reports and Robertson complained that Haig's daily telegrams to him contained little more information than the daily press releases. "Not exactly the letter of a CIGS! … He ought to take responsibility also!" was Haig's comment on one such letter (29 July). F. E. Smith (1 August) circulated a paper by his friend Winston Churchill (then out of office), criticising the high losses and negligible gains of the Somme. Churchill argued that this would leave Germany freer to win victories elsewhere. Robertson issued a strong rebuttal