And now, apparently, strangers were holding some sort of unlicensed revelry, down on the point. His sense of smell told him that neither the Master nor anyone else belonging to the Place was with them. True watchdog indignation swelled up in Lad's heart. And he ran at top speed.

The girl's three companions, turning at sight of her gesturing hand, beheld a mahogany-and-white thunderbolt whizzing down the hundred-yard slope toward them.

It chanced that both the men had served long apprenticeship as dog-fanciers; and that both of them knew collies. Thus, no second look was needed. One glimpse of the silently charging Lad told them all they needed to know. Not in this way does a blatant or bluffing watchdog seek to shoo off trespassers. This giant collie, with his lowered head and glinting fangs and ruffling hackles, meant business. And the men acted accordingly.

"Run for it!" bellowed one of them; setting a splendid example by reaching the beached canoe at a single scrambling bound. The second man was no whit behind him. Between them, the canoe, at one shove, was launched. The first man grabbed one of the girls by the arm and propelled her into the wobbling craft; while the other shoved off. The remaining girl,—she of the azure headgear and the verdant waist,—slipped on the grassy bank, in her flight, and sat down very hard, at the water's edge. Already the canoe was six feet from shore; and both men were doing creditable acrobatic stunts to keep it from turning turtle.

"Stand perfec'ly still," one of them exhorted the damsel, as he saw with horror that she had been left ashore in the tumbling flight. "Stand still and don't holler! Keep your hands high. It's likely he won't bother you. These highbred collies are pretty gentle with women; but some of 'em are blue murder to strange men. He—"

The man swayed for balance. His fellow-hero had brought the canoe about, in an effort to smite with uplifted paddle at the oncoming dog without venturing too close to the danger-line.

In the same moment, Lad had gained the brink of the lake. Ignoring the panic-struck woman on the bank, he flashed past her and galloped, body-deep, into the water; toward the swaying canoe.

Here he paused. For Lad was anything but a fool. And, like other wise collies, he had sense enough to realize that a swimming dog is one of the most helpless creatures in the universe; when it comes to self-defense.

Ashore, or in water shallow enough to maneuver his powerful body, Lad could give excellent account of himself against any normal foe. But, beyond his depth, he would fall easy victim to the first well-aimed paddle-stroke. And he knew it. Thus, hesitant, his snarling teeth not two yards from the canoe, he stood growling in futile indignation at the cranky craft's crankier occupants.

The girl who remained on shore plucked up enough panic-courage to catch her gaudy pink parasol by the ferule and to swing its heavy handle with all her fear-driven strength at Lad's skull. Luckily, the aim was as bad as it was vehement. The handle grazed the dog's shoulder, then struck the lake with a force that snapped the flimsy parasol in two. Whereat the girl shrieked aloud; and scuttled back as Lad spun around to face her.