"If men were ready to receive them, such manifestations of mercy would be constant experiences. Is it not only natural they should be? Take a child; he is only happy and secure because every moment of his life his parents help him, protect him, think for him. Without such care and thought, would he live to become a man? It is a marvelous thing that, whereas a child learns to lean wholly on the wisdom of his parents, man, as a rule, seems incapable of wholly trusting an Almighty wisdom; and, when he is forced to realize it, calls it miraculous. The miracle would be if these things did not happen."

I did not answer. We were both silent until the train ran into Paddington.

CHAPTER V

THE EVIDENCE OF THE CIGARETTE-END

I suppose I have my fair share of self-confidence, but there have been occasions when I have felt intuitively that the only chance of success was to have Quarles with me from the beginning. The Kew mystery was a case in point.

It was half-past nine when the telephone bell rang. At first the inspector on duty at the station could only hear a buzzing sound, followed by a murmur of voices, which might have come from the exchange; then came the single word, "Police!" As soon as he had answered in the affirmative the message came in quick gasps in a woman's voice:

"Hambledon Road--fourteen--come--it's murder! Quick, I'm being----"

There was a faint cry, as though the woman had been suddenly dragged from the instrument.

The inspector at once sent off a constable, who, with Constable Baker, the man on the Hambledon Road beat at the time, went to No. 14. Their knock was not answered very promptly. A servant came to the door, still fidgeting with her cap and ap.r.o.n, as though she had put them on hastily, and she gave a start when she saw the policeman. She said her mistress--a Mrs. Fitzroy--was at home, but she seemed a little reluctant to let the officers walk into the dining-room without a preliminary announcement, which was only natural, perhaps. They entered to find the room empty. Mrs. Fitzroy was not in the house. The servant knew nothing about the telephone call. She said it was her night out, that she had come in by the back door, as usual, and was upstairs taking off her hat and jacket when the policeman knocked.

This was the outline of the mystery which I gave to Christopher Quarles as we walked from Kew Gardens Railway Station to Hambledon Road. The investigation had only been placed in my hands that morning, and I knew no details myself.

"Shall we find Constable Baker at the house?" he asked presently.

"Yes; I have arranged that," I answered.

The house was a fair size, semi-detached, with half a dozen steps up to the front door, and it had a bas.e.m.e.nt. There was a small window on the right of the door which gave light to a wide pa.s.sage hall, and on the other side was the large window of the dining-room.

Baker opened the door for us.

"No news of Mrs. Fitzroy?" I asked.

"None, sir." He was a smart man. I had worked with him before.

"What time was it when you entered the house last night?" asked Quarles.

"Ten o'clock, sir. A clock struck while we were standing on the steps."

"Was the light burning in the hall and in the dining-room?"

"Yes, sir; full on."

"And the dining-room door was shut?"

"Yes, sir."

"You searched the house for Mrs. Fitzroy?"

"We did. Have you just come from the police station?"

"No."

"I have reported one or two points," said Baker. "The gardens of these houses all have a door opening onto a footpath, on the other side of which there is a tennis club ground.

"The path ends in a blank wall at one end; the other end comes out into Melbury Avenue, a road running at right angles to Hambledon Road.

I found the garden gate here unbolted, and the servant, Emma Lewis, says she has never known it to be unfastened before. Also in Melbury Avenue last evening I saw a taxi waiting. I saw it first at about eight o'clock, and it was still there at a quarter past nine, when I spoke to the driver. He said he had brought a gentleman down, who had told him to wait there, and had then walked up Melbury Avenue. It was not the first time he had driven him to the avenue, and the driver supposed it was a clandestine love affair. After we found that Mrs.

Fitzroy was missing, I went to look for the taxi. It had gone. I had noticed the number, however, and they are making inquiries at the police station."

"Good," said Quarles. "Now let us look at the dining-room. Nothing has been moved, I suppose."

"It's just as we found it last night," Baker returned.

It was a well-furnished room. An easy chair was close to the hearth, and an ordinary chair was turned sideways to the table. A swivel-chair was pushed back from the writing-table, which was in the window, and the telephone, which evidently stood on this table as a rule, was hanging over it, suspended by the cord, the receiver being upon its hook. The telephone directory lay open on the blotting-pad. For some time Quarles was interested in the telephone, the directory, and the pad, then he turned to take in the general aspect of the room.

"Some man was here, evidently," I said, pointing to the ashes on the tiled hearth, "and was smoking. It looks as if he had smoked at his ease for some time."

"Seated in one of those chairs probably," said Quarles. "Some ash is on the writing-table, too."

He took up a sheet of paper and scooped up a little of the ash from the hearth and examined it under his lens; and, having done this, he raked about in the cinders, but found nothing to interest him.

"I want a cigarette-end," he said, looking first in the coal-box, then along the mantelpiece and in the little ornaments there, and, finally, in the paper basket. "Ah, here is one. Thrown here, it suggests that the smoker might have been seated at the table, doesn't it? We progress, Wigan; we progress."

It was always impossible to tell whether the professor's remarks expressed his real opinion, or whether they were merely careless words spoken while his mind was busy in an altogether different direction. I hardly saw where our progression came in. I examined the carpet. If anyone had entered in a hurry to kidnap Mrs. Fitzroy he would not have spent much time in wiping his boots. I found a little soil on the hearthrug and by the writing-table. I pointed it out to the professor, who was still looking at the cigarette which lay in the palm of his hand.

"Yes, very interesting," said Quarles. "I expect the man came by way of the garden and brought a little earth from that pathway with him.

What do you make of this cigarette?"

"A cheap kind. Perhaps the lady smokes."

"We'll ask the servant. By the way, Baker, do you happen to know Mrs.

Fitzroy?"

"I've seen a lady come out of this house on one or two occasions,"

answered the constable. "I described her to the servant, and have no doubt it was Mrs. Fitzroy. She is rather good-looking, fifty or thereabouts, but takes some pains to appear younger, I fancy."

"You are observant," Quarles remarked. "Shall we have the servant in, Wigan?"

Emma Lewin told us that she had been with Mrs. Fitzroy for over three years. Last night she had gone out as usual about six o'clock. She had left by the back door and had taken the key with her. She always did so. She returned just before ten, and had gone straight upstairs to take off her hat and jacket. She always did this before going in to see whether her mistress required anything.

"Was the dining-room door shut when you went upstairs?" I asked.

"Yes."

"You did not go by the garden gate last night?"

"No. I never go that way. The gate is never used."