Big Ben's lined face went swiftly gray through its coat of grime, but the firm hand did its instant work with the throttle. Then, swinging from his seat, he grasped the glistening lever and, peering intently forward, stood ready to throw it in reverse. Toomey sprang for the cord and jerked one fierce toot out of the whistle, the old-time signal for down-brakes before Westinghouse and his science put everything at the touch of the engineer. Almost at the moment the swift rush of the train became jarring and rough. Two daring men scampered, monkey-like, along the top of the cars, twisting a brake on each, then darting to the next. A furious gust of steam tore from the escape-valve and streamed away overhead. Not a thing was in sight on the track, not a soul on the platform, to account for the alarming signal. A switch-target clanked as they tore over the points; a vagrant dog scurried away toward the once thriving saloon, and not until they drove in, hissing, grinding, and bumping, to the side of the dusty platform, did Ben's keen eyes catch sight of two herdsmen's horses--cow ponies--tethered back of the shanty beside the saloon, and up went the lid of his box at the instant, in went his right hand, and then out it came full grasp on a brown-barrelled six-shooter. CHAPTER IX BAD NEWS FROM THE MINES "A hold-up," muttered Toomey, as, obedient to Big Ben's orders, "Duck, you two!" he and Geordie crouched for the moment in the dark interior of the cab. But who would hold up a freight bound to, not away from, the mines? Twice, thrice, indeed, since the cavalry had been sent from Fort Reynolds, the overland express had been flagged between Argenta and Summit Siding, and masked men had boarded the train, despoiled the passengers and Pullmans; and once old Shiner had come under suspicion because certain plunder was found at his place.