《明史·志·卷四十八》
鸿胪寺，各府，都是正四品，国子监、宣抚司，都是从四品，铜印，二寸五分见方，厚五分。
鸿胪寺各府，俱正四品，国子监、宣抚司，俱从四品，铜印，方二寸五分，厚五分。
The Honglu Temple and each prefecture are all fourth-rank officials. The Guozijian and the Xuanfusi are both fourth-rank officials with copper seals of 2.5 inches square and a thickness of 0.5 inches.