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.
I won't let it.
Das lasse ich nicht zu.
No lo permitiré.
J’y veillerai.
Eu não permitirei.
Я не позволю.