As soon as Jim was old enough to have an interest beyond his breakfast and the worrying of his rag ball, Tug Blackstock set about his training. It was a matter that could not be hurried. Tug had much work to do and Jim, as behoved a growing puppy, had a deal of play to get through in the course of each twenty-four hours. Then so hard was the learning, so easy, alas! the forgetting. Tug Blackstock was kind to all creatures but timber thieves and other evil-doers of like kidney. He was patient, with the long patience of the forest. But he had a will like the granite of old Bald Face. Jim was quick of wit, willing to learn, intent to please his master. But it was hard for him to concentrate. It was hard to keep his mind off cats, and squirrels, the worrying of old boots, and other doggish frivolities. Hence, at times, some painful misunderstandings between teacher and pupil. In the main, however, the education of Jim progressed to a marvel. They were a pair, indeed, to strike the most stolid imagination, let alone the sensitive, brooding, watchful imagination of the backwoods. Tug Blackstock was a tall, spare figure of a man, narrow of hip, deep of chest, with something of a stoop to his mighty shoulders, and his head thrust forward as if in ceaseless scrutiny of the unseen. His hair, worn somewhat short and pushed straight back, was faintly grizzled. His face, tanned and lean, was markedly wide at the eyes, with a big, well-modelled nose, a long, obstinate jaw, and a wide mouth whimsically uptwisted at one corner. Except on the trail--and even then he usually carried a razor in his pack--he was always clean-shaven, just because he didn't like the curl of his beard. His jacket, shirt, and trousers were of browny-grey homespun, of much the same hue as his soft slouch hat, all as inconspicuous as possible. But at his throat, loosely knotted under his wide-rolling shirt collar, he wore usually an ample silk handkerchief of vivid green spattered with big yellow spots, like dandelions in a young June meadow. As for Jim, at first glance he might almost have been taken for a slim, young black bear rather than a dog. The shaggy coat bequeathed to him by his sheep-dog sire gave to his legs and to his hindquarters an appearance of massiveness that was almost clumsy. But under this dense black fleece his lines were fine and clean-drawn as a bull-terrier's. The hair about his eyes grew so long and thick that, if left to itself, it would have seriously interfered with his vision. This his master could not think of permitting, so the riotous hair was trimmed down severely, till Jim's large, sagacious eyes gazed out unimpeded from ferocious, brush-like rims of stubby fur about half an inch in length. II