But the train of thought did suggest another. If the murderer had had to take that precaution, he must have done his share of smoking; therefore he had been there for some time; therefore he was most likely someone whom Mr Ufferlitz knew — someone who might even have talked to Mr Ufferlitz for quite a while before putting a gun to his occiput and blowing it out through his forehead.
And that suggested something else. Simon stood behind Mr Ufferlitz and sighted along the line that the bullet would probably have taken. It carried his eyes to a fresh scar gouged in the panelling opposite. He walked over to it, and had no doubt that it had been made by the spent bullet. But either the slug had not had enough force left to embed itself properly in the woodwork, or else it had been carefully pried out: it was not in the hole, or on the floor below it. There was no way to tell even the caliber of the gun which had been used. The murderer seemed to have been quite efficient.
And he had not left behind any muddy footprints, buttons, shreds of cloth, hairs, hats, scraps of paper, cigarette lighters, handkerchiefs, keys, match booklets, cuff links, spectacles, gloves, combs, wallets, rings, fraternity pins, fobs, nail files, false teeth, tie clips, overcoats, ticket stubs, hairpins, garters, wigs, or any of the other souvenirs which murderers in fiction are wont to strew around with such self-sacrificing generosity. He had just walked in and smoked a few cigarettes and fired his gun and emptied the ashtrays and walked out again, without leaving any more traces than any normal visitor would leave.
“Which is Unfair to Disorganised Detectives,” said the Saint to himself. “If I knew where the guy lived I’d picket him.”
But the flippancy was just a ripple on the surface of his mind, and underneath it his brain was working with the steady flow of an assembly line, putting together the prefabricated pieces that he had been collecting without knowing what they were for. If he was right, and the murderer was someone whom Mr Ufferlitz had known well enough to entertain in his study at that hour, there was at least a fair chance that it was someone whom Simon had already met. It might even be more than a chance. The Saint was probing back through the threads that he had once tried to weave together when there was nothing to tie them to. And the note in his pocket, the note that had brought him there, with its hurried scrawl and emphatic capitals, came into his mind as clearly as if he had taken it out to look at it. Had Byron Ufferlitz written it because something had happened to warn him that he would be in danger that night?
Or hadn’t he written it?
Had somebody seen the Saint’s entrance — literally — into the picture as the heaven-sent gift of a ready-made scapegoat, and cashed in on it without one day’s delay? Had it been sent only to bring him there at the right moment, so that...
All at once Simon was aware of the silence again. The whole house was wrapped in an empty hush that seemed to close in on him with an intangible pressure, while he tried to strain through it for any sound that would crystallise this re-awakened vigilance. He was very cool now, utterly limber and relaxed, with the triggered stillness of a cat.
There was no sound even yet.
He went out of the study and crossed the hall, moving with the same supple noiselessness. The front door had a small glass panel in it, and he looked out through that without touching anything. There was a car parked outside now, without lights, and two dark figures stood beside it. While he looked, a flashlight beam stabbed out from one of them, swept over the lawn, flicked across the front of the house, and wavered nosily over palm trees and shrubbery. The two figures began to move up the paved walk. The Saint didn’t have to see them any better to know what they were.