Corpus record: the TAH Foundation story corpus holds his own encyclopedia entry as a work page — 1866. S. B. Liu 劉西北 (published 2017-08-22). His wife’s parallel entry sits at 1865. A. N. Liu 劉安諾.
Corpus scans 2026-09-22 (slice 09210906-24), 2026-09-25 (slice 09232232-19), and 2026-09-26 (slice 09251047-11): fresh greps across works/ and articles/ — no further memoir/news mentions. The only additional 西北 matches are unrelated place-name uses (TANLA 洛杉磯西北區台灣同鄉會, NATMA 西北(西雅圖)分會, WWII internment-camp memoir).