Gus knew the watchman must be about, though possibly half asleep. He also believed that the suspected youth, by the way he advanced, must know the ways of the watchman. Roger, the big Saint Bernard, let out a booming roar and came bounding down the driveway; the fellow spoke to him and that was all there was to that. Gus stayed well behind, fearing the friendly beast might come to him also and thus give his presence away, but Roger was evidently coaxed to remain with the first comer.
The big house stood silent, bathed in the moonlight; there was no sign of anyone about, other than the miscreant who stood now in the shadow, surveying the place. Presently he put down his pack, went to a window and, quick and silent as an expert burglar, jimmied the sash. There was only one sudden, sharp snap of the breaking sash bolt and in a moment the fellow had vanished within the darkness and Gus distinguished only the occasional flash of a pocket torch inside.
There was but one thing to do, and that as quickly as possible. The dog had gone around to lie again on the front veranda. Gus made a bolt for the rear of the grounds, reached the garage, found an open door, began softly to push it open and suddenly found himself staring into the muzzle of a revolver that protruded from the blackness beyond.
"Don't shoot! I'm Gus Grier, Mr. Watchman." The boy was conscious of a certain unsteadiness in his own voice.
"Oh! An' phwat air yes doin' here?"
"Talk low," said Gus, "but listen first: There's a burglar in the house. I spotted him some time ago, followed him and saw him get through the dining-room window. Move fast and he's yours!"
Pat moved fast. He recognized that he had not been up to his duty so far and he meant to make amends. With Gus following, the boy's nerves on edge with the possibility that the housebreaker would shoot, the Irishman, who was no coward, reached the house, entered the basement, flooded the house with light, alarmed the inmates and in a few minutes had every avenue of escape guarded, the chauffeur, butler and gardener coming on the scene, all half dressed and armed.
What followed needs little telling. Hardly had the men decided to search the house before the sound of a rapidly approaching motor horn was heard and from the quickly checked car two men leaped out, the constable and a deputy from the town—and then Bill Brown! The illuminated house had stopped their course. The search revealed Thad cowering in a closet, all the fight gone out of him. Grace and Skeets were not even awakened; Mrs. Hooper did not leave her room.
As the constable turned a light on the handcuffed prisoner he remarked: "That's the chap all right. Description fits. He'll bring that five hundred all right."
"A reward; is it?" said the watchman. "An' don't ye fergit who gits it. Not me, ner you, Constable, but the bye here." He laid his hand on Gus's shoulder. The constable laughed: