So they left their first camp and sped away and away again along the white road, eating up the miles. Their spirits rose after the first effort, because it seemed so easy. The stiffness wore off and they seemed to grow stronger. The only thing that worried Nell at all was the thaw. It made the snow soft, so that the trail was heavy, and every now and then they heard the tiny trickle sound that meant water from somewhere.
Again, supposing they were followed, the trail was deep and obvious. Of course, if the thaw continued the snow would go into a slush, but at present the track lay horribly plain, long ruts made by the sled runners and the print of Robin's feet.
However, there was no use lamenting what could not be helped, but it made Nell more anxious than she showed in her manner. They stopped every now and then to change places, and made the longer halt about twelve for dinner as before. They were so hot with pulling that there was not the least hankering after hot food, which was a comfort, as the meal was made off pemmican as before.
It was late afternoon, and when they were beginning to get tired--really tired, that the first serious check came in the long hours of swift progress.
The thaw seemed to have ceased and an icy wind got up, moaning dismally in the tree-tops. The river, which had been always rather narrow, widened out within a sort of gorge of rocks and brushwood. The bed of it began to slope slightly in a long series of what would be rapids when the water was flowing, and then, on a turn, they came to the rocky dip of a high waterfall. Frozen it was still, of course. One mass of ice and snow. Rather a terrible place in the strange stillness of its hold-up. And everywhere rocks--rocks and steep, difficult places blending with the forest.
"And now what next?" said David, looking about.
"Let's look round first," his sister answered cautiously.
So they left the sled, and taking Robin they made an examination of both sides of the fall. This was a long business, but it ended in the discovery that the river made a sharp loop here, as well as a fall, and their best plan would be to drag the sled through the wood--down the hill, of course--cut across the loop, and pick up the river again about a mile below.
It was going to delay them some time, and both of them were too well versed in scoutcraft to think for a moment that it would confuse the trail or shake off a pursuer, because what they had done would be so obvious. However, it could not be helped, and so Nell, keen to get it over, decided to start on this overland bit at once. David was willing enough, but they soon found the business was a worse job than their worst fears had reached.
A yard or two at a time, and then it became a matter of going far round some impossible obstacle, cutting a way through impassable undergrowth, or letting the sled down a rock wall. And darkness was closing in.