《明史·志·卷四十八》
通政司、大理寺、太常寺、詹事府、京卫、各按察司、各卫，都是正三品，苑马寺、宣慰司，都是从三品，钢印，二寸七分见方，厚六分。
通政司、大理寺、太常寺、詹事府、京卫、各按察司、各卫，俱正三品，苑马寺、宣慰司，俱从三品，铜印，方二寸七分，厚六分。
The Tongzhengsi, Dali Temple, Taichang Temple, and the Bureau of Examination are all third-rank officials. The 苑马寺 and the Xuanwei Bureau are both third-rank officials with iron seals of 2.7 inches square and a thickness of 0.6 inches.