My inspector-general, Lieutenant-Colonel Sterling, felt obliged to resign for business reasons connected with events in his father's family, and I had to part with another faithful friend and able officer. As the adjutant-general is the centre of the formal organization, keeping its records, carrying on its correspondence, and formulating the orders of his chief, so the inspector-general is the organ of discipline and of soldierly instruction as well as the superintendent of the outpost and picket duty, which makes him the guardian of the camp and the head of the intelligence service when no special organization of the latter is made. He should be one of the most intelligent officers of the command, and a model of soldierly conduct. It was no easy thing to fill Colonel Sterling's place, but I was fortunate in the selection of Major Dow of the One Hundred and Twelfth Illinois, a quiet, modest man, a thorough disciplinarian of clear and strong intellect, and of that perfect self-possession which is proof against misjudgment in the most sudden and terrifying occurrences. I had brought with me from East Tennessee, as my chief of artillery, Major Wells, who had commanded an Illinois battery, and who directed the artillery service of the division with great success. My medical director was Surgeon-Major Frink, of Indiana, who, though he took the position by virtue of his seniority in the division medical staff, was as acceptable as if I had chosen him with fullest knowledge of his qualifications. The topographer was Lieutenant Scofield of the One Hundred and Third Ohio, educated in civil engineering, and indefatigable in collecting the data by which to correct the wretched maps which were our only help in understanding the theatre of operations. He was a familiar figure at the outposts, on his steadily ambling nag, armed with his prismatic compass, his odometer, and his sketch-book. The division commissary of subsistence was Captain Hentig, a faithful and competent officer who worked in full accord with Captain Day, the energetic quartermaster who had come with me over the mountains the preceding year.