《宋史·列传·卷二百三十二》
中书舍人勾龙如渊对秦桧说： 邪说纷起，为何不择台官击破它们。 秦桧就奏请勾龙如渊为御史中丞，勾龙如渊首先弹劾胡铨。
中书舍人勾龙如渊抗言于桧曰： 邪说横起，胡不择台官击去之。 桧遂奏如渊为御史中丞，首劾铨。
Gou Longruyuan, a clerk in the imperial secretariat said to Qin Hui: Rumors and fallacies are prevalent. Why don’t you select some officials in the court to crack them down? Qin Hui then recommended Gou Longruyuan as the minister of the Supreme Court. Gou impeached Hu Quan first.