Rolfe had obtained from the police-constable a straightforward story of what he had seen, and in this way had picked up some useful information about the crime which it would have taken a long time to extract from the inspector, but he was a sufficiently good detective to have learned that by disparaging the source of your information you add to your own reputation for acumen in drawing conclusions in regard to it. He nodded his head in a deprecating way and emitted a slight cough which was meant to express contempt. "It looks very much like a case of burglary and murder," he said. He was anxious to know what theory his superior officer had formed. "And how do you fit in the letter advising us of the murder?" asked the inspector. He produced the letter from his pocket-book and looked at it earnestly. "There were two of them in it--one a savage ruffian who will stick at nothing, and the other a chicken-hearted specimen. They often work in pairs like that." "So your theory is that one of the two shot him, and the other was so unnerved that he sent us the letter and put us on the track to save his own neck?" "Something like that." "It is not impossible," was the senior officer's comment. "Mind you, I don't say it is my theory. In fact, I am in no hurry to form one. I believe in going carefully over the whole ground first, collecting all the clues and then selecting the right one." Rolfe admitted that his chief's way of setting to work to solve a mystery was an ideal one, but he made the reservation that it was a difficult one to put into operation. He was convinced that the only way of finding the right clue was to follow up every one until it was proved to be a wrong one. Inspector Chippenfield continued his study of the mysterious message which had been sent to Scotland Yard. It was written on a sheet of paper which had been taken from a writing pad of the kind sold for a few pence by all stationers. It was flimsy and blue-lined, and the message it contained was smudged and badly printed. But to the inspector's annoyance, there were no finger-prints on the paper. The finger-print expert at Scotland Yard had examined it under the microscope, but his search for finger-prints had been vain. "Depend upon it, we'll hear from this chap again," said the inspector, tapping the sheet of paper with a finger. "I think I may go so far as to say that this fellow thinks suspicion will be directed to him and he wants to save his neck." "It's a disguised hand," said Rolfe. "Of course he printed it in order not to give us a specimen of his handwriting. There are telltale things about a man's handwriting which give him away even when he tries to disguise it. But he's tried to disguise even his printing. Look how irregular the letters are--some slanting to the right and some to the left, and some are upright. Look at the two different kinds of 'U's.'"