"One moment, Chief Inspector. An opportunity to make your fortune without interfering with your career has come in your way. You have obtained possession of what you believe to be a clue to a murder."

The voice ceased, and Kerry remaining silent, immediately continued:

"Knowing your personal character, I doubt if you have communicated the fact of your possessing this evidence to anyone else. I suggest, in your own interests, that before doing so you interview me."

Kerry thought rapidly, and then:

"I don't say you're right," he rapped back. "But if I come to see you, I shall leave a sealed statement in possession of the officer in charge here."

"To this I have no objection," the guttural voice replied, "but I beg of you to bring the evidence with you."

"I'm not to be bought," warned Kerry. "Don't think it and don't suggest it, or when I get to you I'll break you in half."

His red moustache positively bristled, and he clutched the receiver so tightly that it quivered against his ear.

"You mistake me," replied the speaker. "My name is Zani Chada. You know where I live. I shall not detain you more than five minutes if you will do me the honour of calling upon me."

Kerry chewed furiously for ten momentous seconds, then:

"I'll come!" he said.

He replaced the receiver on the hook, and, walking across to the charge desk, took an official form and a pen. On the back of the form he scribbled rapidly, watched with curiosity by the officer in charge.

"Give me an envelope," he directed.

An envelope was found and handed to him. He placed the paper in the envelope, gummed down the lapel, and addressed it in large, bold writing to the a.s.sistant Commissioner of the Criminal Investigation Department, who was his chief. Finally:

"I'm going out," he explained.

"After what I've said?"

"After what you've said. I'm going out. If I don't come back or don't telephone within the next hour, you will know what to do with this."

The Limehouse official stared perplexedly.

"But meanwhile," he protested, "what steps am I to take about the murder? Durham will be back with the body at any moment now, and you say you've got a clue to the murderer."

"I have," said Kerry, "but I'm going to get definite evidence. Do nothing until you hear from me."

"Very good," answered the other, and Kerry, tucking his malacca cane under his arm, strode out into the fog.

His knowledge of the Limehouse area was extensive and peculiar, so that twenty minutes later, having made only one mistake in the darkness, he was pressing an electric bell set beside a door which alone broke the expanse of a long and dreary brick wall, lining a street which neither by day nor night would have seemed inviting to the casual visitor.

The door was opened by a Chinaman wearing national dress, revealing a small, square lobby, warmly lighted and furnished Orientally. Kerry stepped in briskly.

"I want to see Mr. Zani Chada. Tell him I am here. Chief Inspector Kerry is my name."

The Chinaman bowed, crossed the lobby, and, drawing some curtains aside, walked up four carpeted stairs and disappeared into a short pa.s.sage revealed by the raising of the tapestry. As he did so Kerry stared about him curiously.

He had never before entered the mystery house of Zani Chada, nor had he personally encountered the Eurasian, reputed to be a millionaire, but who chose, for some obscure reason, to make his abode in this old rambling building, once a country mansion, which to-day was closely invested by dockland and the narrow alleys of Chinatown. It was curiously still in the lobby, and, as he determined, curiously Eastern.

He was conscious of a sense of exhilaration. That Zani Chada controlled powerful influences, he knew well. But, reviewing the precautions which he had taken, Kerry determined that the trump card was in his possession.

The Chinese servant descended the stairs again and intimated that the visitor should follow him. Kerry, carrying his hat and cane, mounted the stairs, walked along the carpeted pa.s.sage, and was ushered into a queer, low room furnished as a library.

It was lined with shelves containing strange-looking books, none of which appeared to be English. Upon the top of the shelves were grotesque figures of G.o.ds, pieces of Chinese pottery and other Oriental ornaments.

Arms there were in the room, and rich carpets, carven furniture, and an air of luxury peculiarly exotic. Furthermore, he detected a faint smell of opium from which fact he divined that Zani Chada was addicted to the national vice of China.

Seated before a long narrow table was the notorious Eurasian. The table contained a number of strange and unfamiliar objects, as well as a small rack of books. An opium pipe rested in a porcelain bowl.

Zani Chada, wearing a blue robe, sat in a cushioned chair, staring toward the Chief Inspector. With one slender yellow hand he brushed his untidy gray hair. His long magnetic eyes were half closed.

"Good evening, Chief Inspector Kerry," he said. "Won't you be seated?"

"Thanks, I'm not staying. I can hear what you've got to say standing."

The long eyes grew a little more narrow--the only change of expression that Zani Chada allowed himself.

"As you wish. I have no occasion to detain you long."

In that queer, perfumed room, with the suggestion of something sinister underlying its exotic luxury, arose a kind of astral clash as the powerful personality of the Eurasian came in contact with that of Kerry.

In a sense it was a contest of rapier and battle-axe; an insidious but powerful will enlisted against the bulldog force of the Chief Inspector.

Still through half-closed eyes Zani Chada watched his visitor, who stood, feet apart and chin thrust forward aggressively, staring with wide open, fierce blue eyes at the other.

"I'm going to say one thing," declared Kerry, snapping out the words in a manner little short of ferocious. He laid his hat and cane upon a chair and took a step in the direction of the narrow, laden table. "Make me any kind of offer to buy back the evidence you think I've got, and I'll bash your face as flat as a frying-pan."

The yellow hands of Zani Chada clutched the metal k.n.o.bs which ornamented the arms of the chair in which he was seated. The long eyes now presented the appearance of being entirely closed; otherwise he remained immovable.

Following a short, portentous silence:

"How grossly you misunderstood me, Chief Inspector," Chada replied, speaking very softly. "You are shortly to be promoted to a post which no one is better fitted to occupy. You enjoy great domestic happiness, and you possess a son in whom you repose great hopes. In this respect Chief Inspector, I resemble you."

Kerry's nostrils were widely dilated, but he did not speak.

"You see," continued the Eurasian, "I know many things about you.

Indeed, I have watched your career with interest. Now, to be brief, a great scandal may be averted and a woman's reputation preserved if you and I, as men of the world, can succeed in understanding one another."

"I don't want to understand you," said Kerry bluntly. "But you've said enough already to justify me in blowing this whistle." He drew a police whistle from his overcoat pocket. "This house is being watched."

"I am aware of the fact," murmured Zani Chada.

"There are two people in it I want for two different reasons. If you say much more there may be three."

Chada raised his hand slowly.

"Put back your whistle, Chief Inspector."

There was a curious restraint in the Eurasian's manner which Kerry distrusted, but for which at the time he was at a loss to account. Then suddenly he determined that the man was waiting for something, listening for some sound. As if to confirm this reasoning, just at that moment a sound indeed broke the silence of the room.