A general officer's aides-de-camp are usually his most intimate associates in the military family, and were sometimes selected with too much regard to their social qualities. Those of a major-general were appointed on his nomination, but a brigadier-general must detail the two allowed him, from the lieutenants in his command. When commanding a division, custom allowed him to detail a third. They were the only officers technically called the personal staff, the others being officers of the several staff corps, or merely detailed from regiments to do temporary duty. Thus, no inspector-general was allowed to a brigadier, but when commanding a division or other organization larger than a brigade, he was permitted to detail an officer of the line for the very necessary and responsible duty. The aides are authorized to carry oral orders and to explain them, to call for and to bring oral reports, and as the general's confidential and official representatives they should be of the most intelligent and soldierly men of their grade. All the other staff officers may be called upon to act as aides when it is necessary, but these are _ex officio_ the ordinary go-betweens, and, if fit for their work, are as cordially welcomed and almost as much at home with the brigade commanders as with their own chief. My senior aide, after my brother's promotion, was Lieutenant Coughlan of the Twenty-fourth Kentucky, a handsome young Irishman of very humble origin, to whom the military service had been the revelation of his own powers and a noble inspiration. He was lithe and well set up, though by no means a dandy; would spring at call for any duty, by night or by day, and delighted the more in his work, the more perilous or arduous it was. He was captured in the last days of our operations about Atlanta; [Footnote: Official Records, vol. xxxviii. pt. v. p. 623.] but the exchange of prisoners negotiated by Sherman gave me the opportunity to secure his return after a month's captivity and imprisonment at Charleston. Two months later he died heroically in the battle of Franklin. [Footnote: _Id_., vol. xlv. pt. i. p. 356.] Lieutenant Bradley of the Sixty-fifth Illinois was second on the list, an excellent officer who was competent and ready to assist the adjutant-general in his department when work there was pressing.