《新唐书·列传·卷一百一十九》
司空图没有儿子，以外甥为后嗣，曾遭御史指控，昭宗并不加责。
图无子，以甥为嗣，尝为御史所劾，昭宗不责也。
Sikong Tu did not have a son, and adopted his nephew as his heir. He was accused once by an imperial historian, but Emperor Zhao Zong did not blame him.