'But you could decline to take this risk if you wished. However, we have considered the matter. There will be a salary of a pound a night while you are watchman, and a liberal reward if the offender is apprehended. Now I want you to finish your work, and join me at the police station. Don't let other employees see you going there. We will make our final arrangements with the officials of the police.'
It may be imagined that David was somewhat excited after such an announcement. Not for one moment did he think of declining the task required of him; for he looked upon it as a duty. He obtained good wages, these people had been kind to him, and if he could serve them, all the better. Besides, it might lead to a better and more highly-paid post. He polished the brass of his lift, put aside his livery, and emerged from the building, leaving one of the officials to close the establishment. Then, taking a side street, he hurried to the police station. Once there the final arrangements were soon made. The manager already knew that David was lodging with a policeman, and to our hero's pleasure he learned that Constable Hemming was to take duty outside the store, being relieved by a friend. Both were to be provided with keys, while David was presented with a basket containing food and drink. An electric torch was handed to him, as well as a life preserver and a whistle. Thus equipped he drove back to the establishment at ten that night, and slipped cautiously into the store.
Just keep moving and doing things all the while,' Hemming advised him. 'Lights are always kept going on all the floors, so that you'll have no difficulty in seeing. But it's wonderful how sleepy a fellow gets, especially when he's done the job on more than one occasion. Keep moving is the thing. Always remember to walk softly. If you spot anything funny, keep quiet, and come along to warn me. The end of a stick pushed through the letter-box will tell me I'm wanted. Don't get scared. It's only fools and babies as fly from their own shadows.'
Nevertheless David found the ordeal of promenading the huge store all alone in the silent hours of the night something of an ordeal. For there were a hundred minor sounds and queer noises to arrest his attention and rouse his suspicions. However, he mastered his fears, and soon began really to like the work. Nor did he forget the constable's advice. During the whole time he was on duty he never once sat down, save to eat a meal. All the rest of the time he was walking through the place, making not a sound with his cotton-padded soles, and because of the movement easily managing to keep awake. Indeed, so well did he sleep during the day when he returned with the constable, that he found no wish to rest at night. The exercise he took kept him wakeful and brisk, ready for anything. But a week came and went, and till then nothing had happened. It was on a Saturday night, soon after midnight, that our hero suddenly realised that another strange mixture of sounds was coming to his ear and echoing dully through the store. Instantly he was on the qui vive.
'Some one moving down below,' he told himself. 'Yes, in the basement: I'll slip down in that direction.'
Gripping his life preserver, and with the electric torch in his other hand, he stole across to the stairway, and crouching there peered over the banisters. No one was to be seen, and now his ear could not detect a noise. Then, suddenly, a sound reached him. It was a man whispering. Instantly David clutched the banister and lowered himself head foremost till he was able to look into the basement, in the centre of which one single light glimmered. Click! There was the sound of a muffled footstep, and then a sudden gleam of light over on the far wall. As David looked he saw the door of a huge cupboard, in which employees were wont to hang their hats and coats, slide open, while the figure of a man appeared. There was an electric torch in his hand, and with this he lit the way behind him. Then another figure appeared, and following him two others. They stepped into the store, carrying a heavy burden with them.
'At last,' said our hero, struggling back into the stairway. 'Time I went to warn Constable Hemming.'