"But the plans were on display."On display? I eventually had to go down to the cellar to find them."That's the display department."With a flashlight."Ah, well, the lights had probably gone."So had the stairs."But look, you found the notice, didn't you?"Yes, said Arthur, "yes I did. It was on display in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying 'Beware of the Leopard."