Xǔ Yǒurén 許有壬 (1287–1364), zì Kěyòng 可用, hào Guītáng lǎorén 圭塘老人, native of Tāngyīn 湯陰 (Xiàngzhōu, Héběi). Yányòu 2 (1315) jìnshì. Career spanned 50 years in office, including three terms in zhèngfǔ; rose to Jíxián dàxuéshì, Zhōngshū zuǒchéng, jiān Tàizǐ zuǒyùdé; retired and died; posthumous name 文忠 Wénzhōng. Recorded in Yuánshǐ j. 182 as one of the guǎngé jùshǒu “late-Yuán museum-pavilion master-hands.” Tài-dìng-era (1324-) memorial against the sons of Tiēmùdiéér (Qiánlóng-era sinicized to Tèméndéěr 特捫德爾) and the Píngzhāng zhèngshì Zhào Shìyán unjust-treatment case; later memorial on Tèkèshí 特克什 (Yuán original Tiēshí)‘s sister case — both preserved in the Zhìzhèng jí KR4d0508 and supplementing the Yuánshǐ biography. His Yuánshǐ biography contains many memorials and statements on great affairs of state. Brother Xǔ Yǒufú 許有孚 edited and prefaced his other collection Guītáng xiǎogǎo KR4d0509.