《明史·列传·卷一百九十二》
后湖这个地方，洪武时期在湖中设置黄册库，令主事、给事中各一人守护，百官不得进去。
后湖者，洪武时置黄册库其中，令主事、给事中各一人守之，百司不得至。
During the Hongwu period, the government set up a Yellow Register Office in the lake at Houhu, and ordered one person in charge of the administration and one person in charge of the documents to guard it. No officials were allowed to enter.