"How do you know he's your dog?" he demanded.

"Because he is," was the reply.

"Mere assertion," Walt said sharply.

In his slow and pondering way, Skiff Miller looked at him, then asked, with a nod of his head toward Madge:

"How d'you know she's your wife? You just say, 'Because she is,' and I'll say it's mere assertion. The dog's mine. I bred 'm an' raised 'm, an' I guess I ought to know. Look here. I'll prove it to you."

Skiff Miller turned to the dog. "Brown!" His voice rang out sharply, and at the sound the dog's ears flattened down as to a caress. "Gee!" The dog made a swinging turn to the right. "Now mush-on!" And the dog ceased his swing abruptly and started straight ahead, halting obediently at command.

"I can do it with whistles", Skiff Miller said proudly. "He was my lead dog."

"But you are not going to take him away with you?" Madge asked tremulously.