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 suchlike privileged persons. Nicholas had not had much experience of the art of fitting keys into keyholes and turning locks, but for some days past he had practised with the key of the schoolroom door; he did not believe in trusting too much to luck and accident. The key turned stiffly in the lock, but it turned. The door opened, and Nicholas was in an unknown land, compared with which the gooseberry garden was a stale delight, a mere material pleasure.