Very soon the girls realized that it was getting too dark even to distinguish the path at all. They stumbled blindly on through the heather, conscious only that they were going downhill, but whether they were really retracing their steps or not, it was impossible to tell. Spot, whose spirits had failed him, followed at their heels. Faster and faster fell the darkness; the girls linked arms to avoid getting separated. They were both thoroughly frightened. Would they be obliged to spend the night upon the moor? If there were only some means of finding the way back to Glenbury!