Quotes from the movie:

Dr. Tart (Tim Conway): [reading the note from Jock’s killer] If Jock could talk, he’d give you a clue. But now that he’s dead, what can you do? He deserved what he got, I don’t regret it a bit. By the way, you’re standing in bull ca-ca.

Dr. Tart (Tim Conway): [reading the note from the killer] I said when I died, that I’d come back. If you believe in ghosts, you’re on the right track. I’m out of the grave, and roaming the moores. If you want to be safe, you better lock all the windows and screens.

Doll voice: Listen up dummies. The help is all gone, the house is bare. Now you know, a shadow is there. There’s one left to die, then my job’ll be done. I like killing people, it’s a lotta kicks!

Dr. Tart (Tim Conway): [reading the note from Uwatsum’s killer] In this house, it’s hard to survive. Some’ll be dead, who are now alive. Mr. Uwatsum is gone, ‘cause he knew too much. Bye for now, but rest assured we’ll keep in constant contact with each other.

Dr. Tart (Tim Conway): [reading the tombstone engraved by Tibet’s killer] To dig your own grave, is quite a sight. But to bury yourself, is not very bright. There are more to kill, and the job’ll be done. Now there are five, soon there’ll be a lot less.

Dr. Tart (Tim Conway): [reading the note from Lord Morley] Now you will see, I can do something right. I’m going to show you, a killer tonight. I want Phyllis to come to my chamber, and see. Who was the one, who murdered Lady Morley and myself.

Dr. Tart (Tim Conway): [Reading a note next to the dead Hilda]Hilda is dead, and here’s something to note. You can’t bury her at sea, ‘cause her bosoms will float.

And my favorite:

Dr. Tart (Tim Conway): You want another glass of pus?
Inspector Winshop (Don Knotts): No I don’t want another glass of pus!