Public domain
Ushi Hihitsu, Volume 1: Selections from Western Internal Medicine / by Johannes de Gorter; translated by Kaen-sensei (with ink inscription by Udagawa Gensai on the flyleaf)
From the collection of National Diet Library, Japan. Free to download, adapt and use — no permission needed.
Credit line宇氏秘笈 第1冊 第1冊: 西洋内科撰要 / [Johannes de Gorter][著] ; 槐園先生[訳] (見返しに宇田川興斎の墨書あり). [江戸後期] [写]. Gorter, Johannes de, 1689-1762. National Diet Library, Japan. Public domain.