During these terrible weeks Billy found it impossible to keep Isobel and the baby Isobel out of his mind night or day. The fear grew in him that somewhere in the wilderness they were suffering as others were suffering. So obsessed did he become with the thought that he had a terrible dream one night, and in that dream baby Isobel's face appeared to him, a deathlike mask, white and cold and thinned by starvation. The vision decided him. He would go to Fort Churchill, and if McTabb had not been driven in he would go to his cabin, over on the Little Beaver, and learn what had become of Isobel and the little girl. A few days later, on the twenty-seventh day of January, there came a sudden rise in the temperature, and Billy prepared at once to take advantage of the change. A half-breed, on his way to Churchill, accompanied him, and they set out together the following morning. On the twentieth of February they arrived at Fort Churchill. Billy went immediately to detachment headquarters. There had been several changes in two years, and there was only one of the old force to shake hands with him. His first inquiry was about McTabb and Isobel Deane. Neither was at Churchill, nor had been there since the arrival of the new officer in charge. But there was mail for Billy-- three letters. There had been half a dozen others, but they were now following up his old trails somewhere out in the wilderness. These three had been returned recently from Fond du Lac. One was from Pelliter, the fourth he had written, he said, without an answer. The "kid" had come-- a girl-- and he wondered if Billy was dead. The second letter was from his Cobalt partner. The third he turned over several times before he opened it. It did not look much like a letter. It was torn and ragged at the edges, and was so soiled and water-stained that the address on it was only partly legible. It had been to Fond du Lac, and from there it had followed him to Fort Chippewyan. He opened it and found that the writing inside was scarcely more legible than the inscription on the envelope. The last words were quite plain, and he gave a low cry when he found that it was from Rookie McTabb. He went close to a window and tried to make out what McTabb had written. Here and there, where water had not obliterated the writing, he could make out a line or a few words. Nearly all was gone but the last paragraph, and when Billy came to this and read the first words of it his heart seemed all at once to die within him, and he could not see. Word by word he made out the rest after that, and when he was done he turned his stony face to the white whirl of the storm outside the window, his lips as dry as though he had passed through a fever. A part of that last paragraph was unintelligible, but enough was left to tell him what had happened in the cabin down on the Little Beaver. McTabb had written: