Continuity mistake: When we see Dorlock Holmes at his desk at the start of the cartoon, you can see that he is writing with the feather in his right hand, but in the next shot he is holding the feather with his left hand.
Deduce, You Say (1956)
1 mistake - chronological order
Directed by: Chuck Jones
Starring: Mel Blanc, June Foray
Dorlock Holmes: I may be down, but the jig is up.
Trivia: On the wall near the door in the "Henry the Eighth's Fifth", there is a sign saying "Burton's Rock Beer" - a reference to John Burton, a production manager at Warner Brothers.