William Duane, A military dictionary
“ The secretary of the war department being in fact the chief of the staff, the rest of the staff should consist of an able practical general officer, a capable chief officer of the artillery, an effective chief officer of the engineers, a vigilant and experienced quarter-master general, and an intelligent and experienced adjutant general, with one or two commissioned officers, as the service might require, attached to each of these several officers as aids, who should execute under a board of war the details of duty ”
