Opium: Historical note, or, the poppy in China. Published by order of The Inspector General of Customs.

Though relatively brief (50pp.) this may be the first historical study of opium in English. Text in English and Chinese. Digital facsimile from the Hathi Turst at this link. Reprinted without the Chinese text, Shanghai: American Presbyterian Mission Press, 1898. Digital facsimile of the 1898 edition also from the Hathi Trust at this link.