keep in the dark("But why keep me in the dark?" "For you to know could not have helped us and might possibly have led to my discovery. You would have wished to tell me something, or in your kindness you would have brought me out some comfort or other, and so an unnecessary risk would be run." (Sir Arthur Conan Doyle) – "Но зачем же было скрывать от меня правду?"ART Vancouver)
