lˈɔŋ əpˈoʊzd tə ðə fˈɔːɹmɚ, hiː ˈɔːlsoʊ bɪkˌeɪm ɐn ˈæktɪv əpˈoʊnənt ʌvðɪ ˈoʊpiəm tɹˈeɪd, ɹˈaɪɾɪŋ tˈuː bˈʊks tə pɹəmˈoʊt ðə bˈænɪŋ ʌv ˈoʊpiəm smˈoʊkɪŋ: “tɹˈuːθ ɐbˌaʊt ˈoʊpiəm smˈoʊkɪŋ” ænd “ðə tʃaɪnˈiːz ˈoʊpiəm smˈoʊkɚ”.
Long opposed to the former, he also became an active opponent of the Opium trade, writing two books to promote the banning of opium smoking: “Truth about Opium Smoking” and “The Chinese Opium Smoker”.