Not so much as waiting to note the effect of his uppercut, Trent was at the other thief; rushing him off his feet and across the room with a lightning series of short-arm blows that crashed through the awkward defence and landed thuddingly on heart and wind. In another few seconds the fight must have ended—and ended with a second clean knock-out—had not one of Trent’s dancing toes chanced to light on a smear of bacon fat on the smooth floor.

Up went both of his feet. He struck ground on the back of his head, after the manner of a novice skater. And, half stunned, he strove to rise. But the impact had, for the moment, knocked the speed and the vigour out of him. Before he could stagger half-way to his feet his opponent had taken dizzy advantage of the slip. Snatching up one of the big bottles by the neck, the thief swung it aloft, measuring with his eye the distance and force needful to a blow over the head of the reeling and dazed Trent.

Then the blow fell. But it did not fall upon Trent. It missed him by an inch or more, and the bottle smashed into many pieces on the boards. This through no awkwardness of the assailant, but because a new warrior had entered the fray.

A flash of gold and white spun through the air, as the bottle was brandished aloft; and a double set of white teeth buried themselves in the striking arm.

Buff, from the doorway, had been watching the battle with quivering excitement. In his brief life he had never before seen prolonged strife among humans. And he did not understand it. To him it seemed these men must be romping, as he and the other inmates of the puppy run had been wont to romp. And he watched the wild performance in breathless interest.

But, all at once, his master was down. And, above him, his foe was brandishing something. Thus menacingly had been raised the farm-hand’s arm when Buff was struck. Surely this was not a romp! His master was threatened. And into the fight gallant young Buff hurled himself—attacking the arm that menaced the quiet-voiced man he was learning to adore.

Just below the elbow he found his grip. Deep drove the sharp white teeth; not slashing, collie fashion, but with the grim holding power that had won a score of battles for old Upstreet Butcherboy. On the swung canvas strip, a hundred of his bull-terrier ancestors had been made to strengthen the crushingly powerful jaw muscles they had bequeathed to Buff.

The pup’s forty pounds of squirming weight deflected the blow’s aim, and saved Trent’s skull from certain fracture.

The thief, in pain and terror, tore at the clinging furry body in frantic rage. But the bulldog jaws were locked, and the fearless collie spirit refused to unlock them at the yells and the hammerings of the panic-stricken thief.

All this for the merest second. Then, still dizzy, but himself again, Trent was up and at his foe.