《明史·志·卷四十八》
三年，礼部尚书陶凯奏请选拔人专门担任东宫官职，罢除兼领，希望对于辅佐教导的事有专人负责。
三年，礼部尚书陶凯请选人专任东宫官，罢兼领，庶于辅导有所责成。
In the third year, Minister of Rites Tao Kai petitioned for the selection of persons to be specifically appointed to official positions in the East Palace, and to abolish the practice of holding concurrent positions, hoping to have dedicated persons responsible for assisting in tutoring.