Cáo Hé 曹禾, hào Jīān 畸庵 (“the Odd-Numbered Hut”; the jī is the Zhuāng-zǐ-tradition “imbalanced / fractional” trope). Mid-19th-century physician-bibliographer of Yánghú 陽湖 (Chángzhōu prefecture, Jiāngsū). The catalog meta gives him as 清; the closing bá of KR3eq097 Yīxué dúshū zhì by his disciple Liú Rǔháng is dated 1851. Cáo’s intellectual trajectory, per Liú’s postface: he first studied the JīnYuán LiúZhāngLǐZhū synthesis and the Míng Xuē Jǐ / Wáng Lún / Lǐ Shízhēn corpus, eventually rejected them all as inadequate, and returned to the yījīng / jīngfāng / Shānghán / Běncǎo foundational layer — a representative voice of the late-Qīng fùgǔ (return-to-antiquity) medical movement. Other works: Yángyī yǎyán 瘍醫雅言, Dòuzhěn suǒyǐn 豆疹索隱. Not in CBDB.