《资治通鉴·宋纪·宋纪二》
江夏内史程道惠接到一封寻阳方面送来的信，信中说： 朝廷将有大规模的非常行动，事情已经明确了。 程道惠派辅国府中兵参军乐，把信封好送给谢晦。
江夏内史程道惠得寻阳人书，言 朝廷将有大处分，其事已审 ，使其辅国府中兵参军乐冏封以示晦。
Cheng Daohui, the Administrator of Jiangxia, received a letter from Xunyang saying: The imperial court is going to take drastic extraordinary actions, and the matter has been made clear. Cheng Daohui sent Le, the military assistant of the Zuo Guo Fu, to seal the letter and send it to Xie Hui.