In my country, an important easter tradition is to watch British crime series on tv. And in one of the series, set in the 60's in Northern England, we heard "bobby" being used as a slang term for police officer/constable. So the lines (from Late Night, Maudlin Street) "Inspector, don't you know? Don't you care? Don't you know about love?" could actually have been "Bobby, don't you know? ..."! So could this be the key to the infamous "Bobby code", r.e. "Bobby, Don't You Think They Know?"