Nell said it was because of the river stream. She was a little afraid of ice bridges, or holes under the snow. The stream in the middle would be swifter than the sides. You never know how the surface freezes, or where the strong stream begins to make its way beneath. The girl thought of all that, because she had been here with her father and he had shown her what to beware of as the spring thaws approached. This was important, while David's mention of their trail was also a point. She decided that they would not go on to the lake, at present. They would follow a more difficult way around the north side and make a camp when they had put some distance between themselves and the place where the river entered the lake.

With this intention then they first did some confusing work. They struck out straight ahead over the snow; then, having gone some distance came back on their own tracks to the starting-place, took off their snowshoes and climbed the bank, lifting the sled over obstacles. It was strenuous work, but it could be done for a yard or two, and all they wanted was to hide their start. Having reached a bare stretch beyond brushwood clumps, Nell went back to obliterate the trail. In this she was helped by the wind, which, blowing harder and harder in icy gusts, whirled the snow round about in eddies, scattering it afresh in finest powdery flakes.

"All the better," said Nell, panting a little as she climbed the slope again. "Now then, Da, 'on, on we go,' as our old spelling book said--next thing is a camp. This blizzardy wind is beastly, but it's helping us all the time."

David agreed as he always did, bravely coming up to the scratch at all times in his sister's steps. All the same, he had never in his life felt worse--that is to say, more exhausted and despondent. The thought of having to set to again and make a camp, and a fire, if it would burn, and then face the night almost unprotected, was not cheering. However, Nell was right about the blizzard; the advantages made up for the misery.

As long as they could they went along the north shore of the lake itself, close to the bank. They returned to it, because of the much easier going, of course, after they had confused the trail by a land tramp of perhaps half a mile. That was awfully hard and could not have continued much longer, as their strength was giving out owing to the obstacles.

Presently, when it became increasingly difficult to see, Nell pulled up at a place where the shore formed some small protection, because the land rose in a slope with trees on the higher part. They could not camp on the ice here, so they landed in a likely place, hopeful of shelter from the snow-laden bushes, and began to make what preparation they could.

To tell the truth, even Nell could have cried at that moment. But there is a great deal in being responsible "boss" of anything! You can't let yourself go if you have real grit, and she had plenty.

They scraped and scraped at the snow till they reached down to the frozen bank and made a sort of barrier. A great deal of it blew back again, but that had to be borne. Fortunately the fire was kind enough to burn--the worst of the storm had not come then--and they were able to get a meal of hot tea and bacon. It made a great difference. Then, protected in a small measure by the upturned sled and the bundles, the bushes, and the heaped up snow, they got ready for "bed." At the last moment Nell did rather a clever thing. She scraped the fire off its first place lower down, making it up again with a good bundle of wood. Then she and David lay down in their bags on the hot, dried ground where the fire had just been built. It answered so well that they both fell asleep at once in spite of the increasing storm.

Nell was very weary indeed. The burden was a growing one, because she had had so little rest in forty-eight hours of strenuous work. Therefore a cry from David close to her ears seemed to ring in her head for hours before she realised that he was shaking her shoulder and calling to her in rather an agitated voice, for him. Then she was awake on the instant. Wide awake and throwing sticks on the dying embers, for the one thing necessary at that instant was obviously a fire.

"It's wolves," David was saying. "But, Nell, they stop up north as a rule, don't they? I say, what a beastly row."