facing them, with his back to the door. The clothespress was just large enough for them to be packed in itâtoo small for any of them to slip down while the door was closed.
âThen there was no blood in the room except what had come from the clothespress. Ingraham, with that gaping slit in his back, couldnât have been stabbed until he was inside the closet, or heâd have bled elsewhere. He was standing close to the other men when he was knifed, and whoever knifed him closed the door quickly afterward.
âNow, why should he have been standing in such a position? Do you dope it out that he and another killed the two friends, and that while he was stowing their bodies in the closet his accomplice finished him off?â
âMaybe,â Dean said.
And that âmaybeâ was still as far as we had gone three days later.
We had sent and received bales of telegrams, having relatives and acquaintances of the dead men interviewed; and we had found nothing that seemed to have any bearing upon their deaths. Nor had we found the slightest connecting link between Ingraham and the other two. We had traced those other two back step by step almost to their cradles. We had accounted for every minute of their time since Ingraham had arrived in San Franciscoâthoroughly enough to convince us that neither of them had met Ingraham.
Ingraham, we had learned, was a book-maker and all around crooked gambler. His wife and he had separated, but were on good terms. Some fifteen years before, he had been convicted of âassault with intent to killâ in Newark, N. J., and had served two years in the state prison. But the man he had assaultedâone John Pellowâhad died of pneumonia in Omaha in 1914.
Ingraham had come to San Francisco for the purpose of opening a gambling club, and all our investigations had tended to show that his activities while in the city had been toward that end alone.
The fingerprints Phels had secured had all turned out to belong to Stacey, the maid, the police detectives, or myself. In short, we had found nothing!
So much for our attempts to learn the motive behind the three murders.
We now dropped that angle and settled down to the detail-studying, patience-taxing grind of picking up the murdererâs trail. From any crime to its author there is a trail. It may beâas in this caseâobscure; but, since matter cannot move without disturbing other matter along its path, there always isâthere must beâa trail of some sort. And finding and following such trails is what a detective is paid to do.
In the case of a murder it is possible sometimes to take a short-cut to the end of the trail, by first finding the motive. A knowledge of the motive often reduces the field of possibilities; sometimes points directly to the guilty one. It is on this account that murderers are, as a rule, more easily apprehended than any other class of criminals.
But a knowledge of the motive isnât indispensableâquite a few murder mysteries are solved without its help. And in a fair proportionâsay, ten to twenty per centâof cases where men are convicted justly of murder, the motive isnât clearly shown even at the last, and sometimes is hardly guessed at.
So far, all we knew about the motive in the particular case we were dealing with was that it hadnât been robbery; unless something we didnât know about had been stolenâsomething of sufficient value to make the murderer scorn the money in his victimsâ pockets.
We hadnât altogether neglected the search for the murdererâs trail, of course, butâbeing humanâwe had devoted most of our attention to trying to find a short-cut. Now we set out to find our man, or men, regardless of what had urged him or them to commit the crimes.
Of the people who had been registered at the hotel on the day of the killing there were nine men of whose innocence we hadnât found a reasonable