Líng Gàn 凌淦, zì Zhòngqīng 仲清, hào Lìshēng 礪生 (late hào Tuìān 退庵), 1833–1895 (CBDB 87718), native of Xīntǎzhèn 莘塔鎮 in Wújiāng 吳江 (Jiāngsū). Xiánfēng jǐwèi (1859) jǔrén, candidate for nèibù zhèngláng 內部正郎 (Ministry of the Interior). A gentry-scholar / physician working in the Sūzhōu Yè Tiānshì lineage; studied under Lǐ Língshòu 李齡壽 (字 Xīntuó 辛坨) and his clan elder Lǐ Jiāliù 李嘉六. His fragmentary single-juǎn casebook survives as KR3ep053 Tuìān yīàn, transcribed in 1896 by his Wújiāng colleague Shěn Chénlín 沈陳麟 (Nángyǐn dàorén 囊隱道人).