"You keep your eye on the wall, I'll watch that extremely suspicious chimney for fires and espionage," said the curly-headed head on the right, without moving even so much as an inch of his lips, "Nothing gets past us, Frank. Nothing."
"Nothing? You know there's a.... a chimney under your chin." said the left head.
"What?! Ha! They're so crafty thinking they could hide in plain sight."
"Your 'ha!s' worry me. I didn't want to mention it really, but it's been there for years ever since that house was built," continued the left head.
"What? They're moving in! Raise the alarm!"
"Again? Please don't make me."
"Yes, again! Look alarmed and less stoney faced."
"You ask a lot of me. You really do," replied the left head.
"It's for the safety of the castle. They get past us and it's modernisation."
"It makes no flippin' difference. You've gone loopy! I think it's the moss in your ears. You've become obsessed."
"Just do it. I'm counting on you to do your bit."
The left head attempted to pull an alarmed face, and it was very similar to, well let's face it, exactly the same as its un-alarmed face. And so, another uncannily similar day slowly passed in the land of the watch urn.
"How's the wall? Any movement?" then asked the right head.
"Umm...not an enemy chimney, pigeon or telephone wire in sight, Sir."