《新五代史·世家·东汉世家第十》
郭无焉是棣州人，方额尖嘴，好学博闻，善于论辩。
无为，棣州人，方颡鸟喙，好学多闻，善谈辩。
Guo Wuyuan was a native of Dizhou with a square forehead, pointed beak of a nose, and a thirst for knowledge. He was well-read and an adroit debater.