《新唐书·列传·卷七十四》
起初，州县派富户督办漕运，称作 船头 ；掌管传递，称作 捉驿 ；在赋税之外乱收刮，称作 白著 。
初，州县取富人督漕輓，谓之 船头 ；主邮递，谓之 捉驿 ；税外横取，谓之 白著 。
Initially, the prefectures and counties sent wealthy households to supervise the transportation of grain, called "ship heads"; those in charge of delivering mail were called "postmen"; and those who collected taxes outside of the tax were called "white authors".