"In time, sir," Inspector Jacks said slowly, "we hope to do so, but over here we may not arrest upon suspicion. We have to collect evidence, and build and build until we can satisfy any reasonable individual that the accused person is guilty."

The Prince sighed sympathetically.

"It is not for me," he said, "to criticize your methods."

"I come now," Inspector Jacks said slowly, "to the object of my call upon Your Highness. Following upon what I have just told you, certain other information has come into my possession to this effect--that not only was this murderer a j.a.panese, but we have evidence which seems to suggest that he was attached in some way to your household."

"To my household!" the Prince repeated.

"To this household, Your Highness," the detective repeated.

The Prince shook his head slowly.

"Mr. Jacks," he said, "you are, I am sure, a very clever man. Let me ask you one question. Has it ever fallen to your lot to make a mistake?"

"Very often indeed," the Inspector admitted frankly.

"Then I am afraid," the Prince said, "that you are once more in that position. I have attached to my household fourteen j.a.panese servants, a secretary, a majordomo, and a butler. It may interest you, perhaps, to know that during my residence in this country not one of my retinue, with the exception of my secretary, who has been in Paris for some weeks, has left this house."

The Inspector stared at the Prince incredulously.

"Never left the house?" he repeated. "Do you mean, sir, that they do not go out for holidays, for exercise, to the theatre?"

The Prince shook his head.

"Such things are not the custom with us," he said. "They are my servants. The duty of their life is service. London is a world unknown to them--London and all these Western cities. They have no desire to be made mock of in your streets. Their life is given to my interests. They do not need distractions."

Inspector Jacks was dumfounded. Such a state of affairs seemed to him impossible.

"Do you mean that they do not take exercise," he asked, "that they never breathe the fresh air?"

The Prince smiled.

"Such fresh air as your city can afford them," he said, "is to be found in the garden there, into which I never penetrate and which is for their use. I see that you look amazed, Mr. Inspector Jacks. This thing which I have told you seems strange, no doubt, but you must not confuse the servants of my country with the servants of yours. I make no comment upon the latter. You know quite well what they are; so do I. With us, service is a religion,--service to country and service to master. These men who perform the duties of my household would give their lives for me as cheerfully as they would for their country, should the occasion arise."

"But their health?" the Inspector protested. "It is not, surely, well for them to be herded together like this?"

The Prince smiled.

"I am not what is called a sportsman in this country, Mr. Inspector Jacks," he said, "but you shall go to the house of any n.o.bleman you choose, and if you will bring me an equal number of your valets or footmen or chefs, who can compete with mine in running or jumping or wrestling, then I will give you a prize what you will--a hundred pounds, or more. You see, my servants have learned the secret of diet. They drink nothing save water. Sickness is unknown to them."

The Inspector was silent for some time. Then he rose to his feet.

"Prince," he said, "what should you declare, then, if I told you that a man of obvious j.a.panese extraction was seen to enter your house on the morning after the murder, and that he was a person to whom certain circ.u.mstances pointed as being concerned in that deed?"

"Mr. Inspector Jacks," the Prince said calmly, "I was the only person of my race who entered my house that morning."

The Inspector moved toward the door.

"Your Highness," he said gravely, "I am exceedingly obliged to you for your courteous attention, and for your kindness after my unfortunate indisposition."

The Prince smiled graciously.

"Mr. Inspector Jacks," he said, "your visit has been of great interest to me. If I can be of any further a.s.sistance, pray do not hesitate to call upon me."

CHAPTER XXIII. ON THE TRAIL

Inspector Jacks studied the bra.s.s plate for a moment, and then rang the patients' bell. The former, he noticed was very much in want of cleaning, and for a doctor's residence there was a certain lack of smartness about the house and its appointments which betokened a limited practice. The railing in front was broken, and no pretence had been made at keeping the garden in order. Inspector Jacks had time to notice these things, for it was not until after his second summons that the door was opened by Dr. Whiles himself.

"Good morning!" the latter said tentatively. Then, with a slight air of disappointment, he recognized his visitor.

"Good morning, doctor!" Inspector Jacks replied. "You haven't forgotten me, I hope? I came down to see you a short time ago, respecting the man who was knocked down by a motor car and treated by you on a certain evening."

The doctor nodded.

"Will you come in?" he asked.

He led the way into a somewhat dingy waiting room. A copy of _The Field_, a month old, a dog-eared magazine, and a bound volume of _Good Words_ were spread upon the table. The room itself, except for a few chairs, was practically bare.

"I do not wish to take up too much of your time, Dr. Whiles," the Inspector began,--

The doctor laughed shortly.

"You needn't bother about that," he said. "I'm tired of making a bluff.

My time isn't any too well occupied."

The Inspector glanced at his watch,--it was a few minutes past twelve.

"If you are really not busy," he said, "I was about to suggest to you that you should come back to town with me and lunch. I do not expect, of course, to take up your day for nothing," he continued. "You will understand, as a professional man, that when your services are required by the authorities, they expect and are willing to pay for them."

"But what use can I be to you?" the doctor asked. "You know all about the man whom I fixed up on the night of the murder. There's nothing more to tell you about that. I'd as soon go up to town and lunch with you as not, but if you think that I've anything more to tell you, you'll only be disappointed."

The Inspector nodded.

"I'm quite content to run the risk of that," he said. "Of course," he continued, "it does not follow in the least that this person was in any way connected with the murder. In fact, so far as I can tell at present, the chances are very much against it. But at the same time it would interest my chief if you were able to identify him."

The doctor nodded.

"I begin to understand," he said.

"If you will consider a day spent up in town equivalent to the treatment of twenty-five patients at your ordinary scale," Inspector Jacks said, "I shall be glad if you would accompany me there by the next train.

We will lunch together first, and look for our friend later in the afternoon."

The doctor did not attempt to conceal the fact that he found this suggestion entirely satisfactory. In less than half an hour, the two men were on their way to town.

Curiously enough, Penelope and Prince Maiyo met that morning for the first time in several days. They were both guests of the d.u.c.h.ess of Devenham at a large luncheon party at the Savoy Restaurant. Penelope felt a little shiver when she saw him coming down the stairs. Somehow or other, she had dreaded this meeting, yet when it came, she knew that it was a relief. There was no change in his manner, no trace of anxiety in his smooth, unruffled face. He seemed, if possible, to have grown younger, to walk more buoyantly. His eyes met hers frankly, his smile was wholly unembarra.s.sed. It was not possible for a man to bear himself thus who stood beneath the great shadow!