"I can make nothing whatever of it," Masefield was fain to admit at last. "There are the shot holes plainly marked, as if somebody had used an air-gun or a pea-rifle. Beyond that I can see absolutely nothing of the slightest significance. The best thing for us to do is to see the contractor who has the job in hand in the morning, and get him to saw the poster out of the wooden hoarding for you. The strong light of day may make a difference; but I am not as yet absolutely satisfied that that mustard poster was placed exactly on the top of the yellow face quite by accident."

Bates did not contest the point. He was getting tired and sleepy, and it was very late. "Very well," he said, "we will return to the police station in Shannon Street and have another look at the dead man. It is just possible we may find something there. At the same time, it may be just as well to be on the safe side. I'll get one of my men to come here and keep an eye on the hoarding to-night. It is on the cards that he may see something suspicious. I'll send a plain clothes man here to watch."

As Bates blew softly on his whistle a constable turned up and saluted. He was to stay where he was until relief came, Bates explained. Then he and Jack Masefield went off in the direction of Shannon Street station. The place was perfectly quiet; nobody had been brought in lately; there was no sign of the tragedy here. In a rack near the back, lighted by a skylight some six feet from the ground, lay the murdered body of the man with the yellow face. The malignant look had gone from his face; he seemed calm and placid. As Jack bent over him it seemed to him that there was a movement of the heart. He pointed this out to the inspector, who shook his head.

"People not accustomed to these things often make the same mistake," he said. "I have heard witnesses swear that the body of this or that man was not bereft of life, and in this belief they have been quite certain. Then a doctor comes along and proves beyond a doubt that death has taken place perhaps five or six hours before. Muscular action is what probably deceives people. That poor fellow is dead enough."

Masefield did not argue the matter. It was a sickening business, and he felt that he would gladly see the end of it. Not so Bates, who was inured to this kind of thing. Very rapidly and skilfully he went over the body in search of anything that might be likely to lead to the identification of the deceased. But the pockets were doubtless empty; there was no watch or chain, or purse, no marking on the linen.

"Not even a laundry mark?" Jack suggested. "If my reasoning is correct, a laundry mark has frequently proved of the greatest assistance."

"No mark whatever," said Bates. "The shirt, for instance, is of ordinary make, the class of thing that one buys ready-made at a shop, and which has usually its maker's mark on. There has been a mark of some kind on the neck band, but it looks as if it had been blocked out with chemicals. See how much whiter and thinner the neck band is. We are simply wasting our time here."

Jack said nothing; he could only shake his head sadly. The more the mystery came to be probed the more maddening did it become. A close investigation of the clothing presented as little result; there was nothing even about the boots to prove where they had been made. If the man was a criminal, and his general air suggested that, he had taken the most amazing precaution to prevent identification in case of accidents. Jack looked at the clear, dark features. This was no man to take anybody into his confidence. Success or failure, or crime, must all be undertaken alike alone and unaided. This face would never have led anybody to rejoice with him in good fortune, or sympathize with him in failure.

"Well, I think I had better be getting to my rooms," Masefield said. "I have given you my name and address. I'll come round to-morrow and see if you have made anything out of the poster in the daylight. One thing is pretty certain--there should be no difficulty, if a determined effort is made, to discover the people who printed the picture of the yellow face. There are not many firms in this country capable of such work."

"There is the Continent," Bates suggested. "I'm afraid that it will be very much like looking for a needle in a hayrick. Still----"