Here were the heads of Q., of A., of G .-- in other words, of Supply, Reinforcement, and Operations.

In a bare room, with a few chairs and tables and an iron stove, the Director of Operations was at work; close by was the office of the Quartermaster-General, while up another staircase and along another narrow passage were the quarters of the Adjutant-General; and somewhere, I suppose, in the now historic building, was or had been the office of the Commander-in-Chief himself.

The Intelligence Department was not far off, I knew, in the old town; I had been its grateful guest in 1917.

The directing Intelligence of the Army flowed out from here to the front, while from the front, at the same time, there came back a constant stream of practical knowledge and experience, keeping the life of G.H.Q.
perpetually fresh, correcting theory by experience and kindling experience by theory.

The complexities and responsibilities of the work done were vast indeed.
"At any time," says an officer of the General Staff, "during the operations of the past year, work was commenced here in the office, or on the train, when G.H.Q.was advanced nearer the battle-line, at any hour before nine o'clock.