Southern Sòng 宋 official and Lù 陸-school xīnxué 心學 (“mind-doctrine”) scholar, the youngest of 袁燮’s four sons. Native of Yín 鄞 county in Qìngyuán fǔ 慶元府 (modern Níngbō 寧波, Zhèjiāng). Zì Guǎngwēi 廣微; hào Méngzhāi 蒙齋; posthumously canonized Zhèngsù 正肅. Lifedates 1174–1240 are firm (CBDB id 10296). Zhuàngyuán 狀元 (top-of-list jìnshì) of Jiādìng 7 / 1214. Held a series of high prefectural and court appointments under Lǐzōng 理宗 (r. 1224–1264), reaching Lǐbù shìláng 禮部侍郎 and the Bǎomógé zhíxuéshì 寶謨閣直學士. Wrote substantially on the Mèngzǐ, the Lúnyǔ, and the Yìjīng; his collected works are the Méngzhāi jí 蒙齋集.
In Sòng Shū-learning he is significant chiefly as the editor and printer of his father’s lecture-notes: in Shàodìng 4 / 1231 he had his elder brother Yuán Qiáo 袁喬’s transcription of their father’s family-school lectures on the Shàngshū — the Jiézhāi jiāshú shūchāo 絜齋家塾書鈔 (KR1b0016) — printed and deposited at the Xiàngshān shūyuàn 象山書院 (the academy founded by Lù Jiǔyuān at Xiàngshān, Jiāngxī), explicitly as a memorial both to his father and to his eldest brother, who had died before completing the family record. Without this filial editorial intervention the work would not have survived to be reconstituted by the Sìkù compilers from the Yǒnglè dàdiàn.