CHAPTER 5McNab was awakened by a low call from Brinklow. His tall partner was standing at the open window of the room. It was just day, that is to say, between two and three o’clock. “Our guide is still on the job,” said Brinklow in his dry way. McNab ran to his side. The window was neatly fitted in a hand-made frame. It had a broad sill resting on the log wall beneath. On the sill lay an oblong piece of birch bark weighted down with two stones. A rough picture of closely growing trees was drawn on the bark with charcoal, and underneath the usual arrow, this time pointing to the south-east. “Follow the direction of the arrow with your eye,” said Brinklow, “and tell me what you see.” “Only the slough and then the prairie,” said McNab. “Look just beyond the top of the second rise.” “I

