But it was no time, now, to be chasing after rabbits.

And once the brown setter caught the scent of a squirrel that had leaped down out of a tree after a nut it had dropped. For a moment Ruddy stopped, and lifted his nose in the air. He had a notion he would like to trail that squirrel, and find where it had its nest in a hollow tree. True the nest would be high up, out of Ruddy's reach, for the dog could not climb like a cat. But if Ruddy trailed the squirrel to its tree the dog could bark joyously at the foot, to show he had done his work well.

But it was no time, now, to be chasing after squirrels.

So Ruddy shook his head, sneezed a little as if to get the smell of the rabbit and squirrel out of his delicate nose and ran on. He was hungry, for there had not been much meat, even on the ten cent bone, but Ruddy forgot his hunger in his great desire to get back to Rick.

And he was weary, for he had not been kindly treated after the sailor had tied him in the junk wagon. But he forgot about being tied, also as he hurried on through the night.

Along the silent country road he went, up the hill, still keeping his nose close to the ground so as not to lose his own scent. It was still "warm." That is it had been made within a few hours. And the longer a scent lies on the ground the harder it is for a dog to trace it. That is why dogs are said to be "hot on the scent," the meaning being that the game has passed along only a little while before.

It is supposed that rabbits, squirrels and other animals each have a scent of their own, and it clings to the ground for some time, even as the smell of perfume clings to a handkerchief after it has been washed.

Pretty soon Ruddy came within sight of the old log cabin. He knew when he was there even before he could see it, for he could smell it, and smell the place where he had walked near it.

But besides this smell there was another. The smell of boys and a man. And among the boys' odors was one that made Ruddy's heart beat faster as he caught it.

It was not the scent of Rick, for the boy master of the dog was inside the cabin, whence the odor did not come out so plainly. But Ruddy caught the smell of Chot, with whom he had played almost as often as he had with Rick.