Milverton blackmails Mary, exploiting her dalliance in antigovernment activities as a student. Sherlock decides to sneak into Milverton's estate to steal his evidence, but even that act was anticipated. Sherlock finds that he is not the only trespasser.
unless we wrestle away the evidence
you're blackmailing her with,
als das Druckmittel
mit Gewalt an uns zu nehmen,
à récupérer le document nous-mêmes
кроме как выкрасть компромат на Мэри.