"Not hereabouts, sir." Mulligan shook his head gloomily. "It's too clean a neighbourhood."
"The very place where a crime is likely to occur. Have you another light, constable?"
Mulligan struck another match, and this time he saw the face of the speaker clearly. It was a handsome face, rather worried-looking. But as the stranger wore a moustache and a small pointed beard, and as his Homberg hat-it was grey with a black band-was pressed down over his eyes, Mulligan could not determine if he were more than usually worried. Not that he minded. He fancied after some reflection that this handsome young gentleman was-as he put it-out on the spree, and therefore took the marks of worry for those of dissipation. He did not even examine the face closely, but when the match was extinguished he halted. "There's the half-hour, sir. I must get back to my beat."
"And I must race for a cab," said the stranger, pressing a half-crown into a not unwilling hand. "Thanks for coming so far with me, officer. I wonder if my watch is right," he added, pulling it out. "It's half-past eleven." Something fell at the moment, chipped against the curb with a tinkling sound, and rebounded into the road. "You've dropped something, sir," said Mulligan, flashing his lantern towards the middle of the street.
The other felt his pockets. "No, I don't think so. Can you see anything? Oh, no matter. I dare say-what can I have dropped?"
The two searched for a time without success. At length the stranger shook his head positively, and felt his pockets again. "You must be mistaken," he remarked. "I don't think anything is missing. However, if you do find anything, you can give it to me when you see me next. You are usually on this beat?"
"For the next three nights, sir."
"Ah then, we are sure to meet. I often come here. Good night." And with a wave of his hand the gentleman walked rapidly away. At the turn of the street he looked back and again waved his hand. It might have been that he was anxious to see if the constable was watching him. But no such suspicion occurred to Mulligan. He was too pleased with the half-crown.
"A fine upstanding young gentleman," was the policeman's verdict; "free with his money" – he here produced the cigarette-"and his tobacco, good luck go with him."
As the inspector was not within sight, and indeed would not be until Mulligan returned to the fixed point in Achilles Avenue, the policeman decided to solace himself with a smoke. After lighting up he threw away the match. It fell almost in the middle of the road, and flamed up brightly in a pause of the wind. Although it went out with the next gust, Mulligan, in the short time, caught with his keen eye the glitter of steel. Striking another match, he searched round, and picked up a latch-key, long and slim and with scarcely projecting wards. "He'll not get to his bed this night," said Mulligan, looking towards the corner. "If I was to run after him now-"
But this, he decided, was impossible. The gentleman, walking at an unusually rapid pace, would be some distance away, and also in the meantime he might have met with a hansom. Also Mulligan had to return to the fixed point, as failure to meet his superior officer would meet with a sharp reprimand. "Ah well," said the philosophic policeman, "the young gentleman will be here to-morrow night, or maybe his sister will be still up, and I can give the key to her."
On the chance of securing another half-crown, Mulligan decided that this latter course would be the more diplomatic. Astutely adopting it, he walked smartly to Achilles Avenue. A consultation of his Waterbury watch assured him that he had nearly twenty minutes to spare before the arrival of the inspector. He therefore sought out Ajax Villa, being guided thereto by the fact that the light was still burning on the first floor. But he heard no singing. However, the light showed that the lady was still in the room, though doubtless the servants-as was shown plainly by the stranger's conversation-were in bed. Mulligan walked up to the door and rang. With some foresight he argued the lady would come herself to the door, whereby he would be more certain of his money.
The wind was dying down, now that it was close upon midnight, and everything in the house and garden was absolutely still. Walking up the path under the umbrageous shelter of the elms, Mulligan saw the colours of the flowers in neutral tints under a faint starry sky. There was no moon, but a kind of luminous twilight pervaded the atmosphere. Mulligan, being a Celt, was not impervious to the charm of the place which might have been Juliet's garden, so strangely had the magic of night transmuted its commonplace into romance. But his housemaid was expensive, and he hurried to the door, anxious to obtain a reward for the return of the key.
Several times did he ring, and although he heard the shrill vibration of the bell echo through the house, no one appeared in answer to its imperative summons. Thinking he might have made a mistake, the constable stepped back into the garden. But he was right. This was the villa out of which the young man had issued, for there burned the guiding light on the first floor. Mulligan felt puzzled by the inexplicable silence and rang the bell again. Indeed he pressed his great thumb on the ivory button for nearly one minute. The bell shrilled continuously and imperiously. Still no one came. Mulligan scratched his head and considered. "Something's wrong," thought he. "If I'd the key I'd enter and see if the lady is ill. Queer, the bell don't waken the servants. Augh! The lazy beasts."
It occurred to him that in his hand he held the key dropped by the young gentleman. Almost without thinking he fumbled for the hole and slipped in the key. To his surprise it turned under his involuntary pressure, and the door swung open noiselessly. Again the constable scratched his head. Things-so he assured himself-were becoming mysterious, and he scented an adventure. It was strange that this key should open the door. "Unless this is his home, and he's running away for some devilment. Maybe the lady isn't his sister; perhaps his wife or his sweetheart. Augh! But she'd not let him go at this hour. Catch her."
However he might argue, it was foolish to stand before an open door without doing something. The inspector would be round soon, and might-probably would-demand an explanation. Now that he had got this far, Mulligan naturally decided to see the adventure through. As yet he had no suspicion that anything was wrong, though he certainly thought the whole affair mysterious. Walking into the dark hall, at the end of which, by the light of his lantern, he saw the glimmer of a marble staircase, he called gently up into the blackness. "Is there any one there?" demanded Mulligan. "If so, come down, for I'm in want of an explanation."
He paused and listened. There came no reply. The dense silence held the house. Not even a clock ticked. Mulligan suppressed his breath and listened with all his ears. No sound filled them save the drumming of his heart. Again he ran into the garden and again assured himself that the light was burning overhead. He began to conclude that the position called for the intervention of the law. Assuming an official air, he tramped up the stairs, flashing the light right and left as he ascended. He did not know the position of the room, save that it was in the front of the house. But thus indicated, he thought there would be little difficulty in finding it and solving the mystery.
From the glimpses he caught, the house appeared to be richly furnished. He saw pictures, velvet curtains, marble statues, and all the paraphernalia of a wealthy man's mansion. The stairs were draped with scarlet hangings, contrasting vividly with the whiteness of the polished marble. On the landing, curtains of the same flamboyant hue were parted before another dark hall. Mulligan crossed this, for he saw-or thought he saw-a thread of light beneath a door. The hall was of marble and filled with tropical plants. A glass roof overhead revealed the starry night and the grotesque forms of the plants. The flooring was of mosaic, and here and there stood velvet-cushioned chairs, deep and restful. Evidently the house was owned by rich and artistic people. And the fitful gleams from his lantern exaggerated the wealth and splendour around.
In spite of the noise made by his boots-which were anything but light-no one appeared to demand the reason of his intrusion. He began to feel an eerie feeling creeping over him. This silent, lordly house, the darkness, the stillness, the loneliness: it was all calculated to appeal strongly-as it did-to the Celtic imagination of the policeman.
Towards the thin stream of light flowing, as it seemed, from under the door, Mulligan took his cautious way. Knocking softly, he waited. No reply came. Again he knocked, and again the silence which struck a chill to his heart ensued. At length he took his courage in both hands and flung open the door. It was not locked. A gush of light nearly blinded him. He staggered