A controversial day-to-day account, by Haig's Chief of Intelligence, at the British Expeditionary Force General Headquarters throughout the war on the Western Front. Charteris had not kept a diary at the time, so 'At GHQ' consists of papers, notes and letters from the time, rewritten into diary form. He confessed to sometimes amplifying from memory but by and large the reconstructed 'diary' is consistent with records which he kept at the time, e.g. his entry for the First Day of the Somme which he states was "not an attempt to win the war at a blow", and that "weeks of hard fighting" lay ahead.

This is an important and interesting work containing much interesting material and revealing gossip.