《后汉书·列传·儒林列传上》
等到王允收拾运到长安的，才七十余车，道路艰远，又丢了一半啊！
及王允所收而西者。裁七十余乘，道路艰远，复弃其半矣。
By the time Wang Yun had finished collecting them in Chang’an, there were only seventy or so carriages left, and due to the long distance, half of them were lost on the way!