She saw the Lad's inhalingly seeking muzzle was steady above a faint mark in the road-dust;--the mark of a buckskin shoe's print.

Long and carefully the dog sniffed.

Then, with heavy deliberation he moved on to the next footprint and the next.

The runabout's driver had taken less than a half dozen steps in all; during his short descent to the ground.
But Lad did not stop until he had found and identified each and every step.
"He knows!" marveled the Mistress.

"He saw the brute jump down from his car.