naturally only the centre of information, the Admiralty convoy room, could serve as a clearing house for such operations. The point is that it was necessary for me to exercise the chief command of American forces through subordinates. My position in this respect was precisely the same as that of Generals Haig and Pershing; I had to maintain a great headquarters in the rear, and to depend upon subordinates for the actual execution of orders. The American headquarters in London comprised many separate departments, each one of which was directly responsible to me as the Force Commander, through the Chief of Staff; they included such indispensable branches as the office of the Chief of Staff, Captain N. C. Twining, Chief of Staff; Assistant Chief of Staff, Captain W. R. Sexton; Intelligence Department, Commander J. V. Babcock, who also acted as Aide; Convoy Operations Section, Captain Byron A. Long; Anti-submarine Section, Captain R. H. Leigh; Aviation Section, Captain H. I. Cone, and afterward, Lieutenant-Commander W. A. Edwards; Personnel Section, Commander H. R. Stark; Communication Section, Lieutenant-Commander E. G. Blakeslee; Material Section, Captain E. C. Tobey (S.C.); Repair Section, Captain S. F. Smith (C.C.), and afterward, L. B. McBride (C.C.); Ordnance Section, Commander G. L. Schuyler, and afterward, Commander T. A. Thomson; Medical Section, Captain F. L. Pleadwell (M.C.), and afterward, Commander Edgar Thompson (M.C.); Legal Section, Commander W. H. McGrann; and the Scientific Section, Professor H. A. Bumstead, Ph.D.