Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Holmes lokaci-lokaci yana amfani da kwayoyi masu sa jaraba, musamman idan babu lokuta masu motsawa. Yana amfani da cocaine, wanda ya yi allurarsa a cikin kashi bakwai cikin ɗari ta hanyar allura da aka ajiye a cikin akwatin fata na Morocco. Ko da yake Holmes ya yi amfani da morphine, ya nuna rashin amincewarsa sosai sa'ad da ya ziyarci wani gidan opium; duka magungunan sun kasance bisa doka a Ingila a ƙarni na 19. A matsayinsa na likita, Watson ya nuna rashin amincewa da halayyar abokinsa na cocaine, yana bayyana shi a matsayin "mai bincike kawai", kuma yana damuwa game da tasirinsa akan lafiyar kwakwalwa da hankali na Holmes. A cikin "The Adventure of the Missing Three-Quarter", Watson ya ce duk da cewa ya "tsarkake" Holmes daga kwayoyi, mai binciken ya kasance mai jaraba wanda al'adarsa "ba ta mutu ba, amma barci ne kawai".  Tambaya: Menene yawan adadin maganin da aka yi amfani da shi?
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