Nicholas made one or two sorties into the front garden, wriggling his way with obvious stealth of purpose towards one or other of the doors, but never able for a moment to evade the aunt's watchful eye. As a matter of fact, he had no intention of trying to get into the gooseberry garden, but it was extremely convenient for him that his aunt should believe that he had; it was a belief that would keep her on self-imposed sentry-duty for the greater part of the afternoon. Having thoroughly confirmed and fortified her suspicions Nicholas slipped back into the house and rapidly put into execution a plan of action that had long germinated in his brain. By standing on a chair in the library one could reach a shelf on which reposed a fat, important-looking key. The key was as important as it looked; it was the instrument which kept the mysteries of the lumber-room secure from unauthorised intrusion, which opened a way only for aunts and such-like privileged persons.