"The obvious thing was to go out and trample on those footprints until they were quite obliterated. But to this plan there were several objections. In the first place, those enormous impressions would take a deal of trampling out. Walking over them once would be quite useless, for his own feet were comparatively small, and even a fragment of one of Lewson's footprints would be easily recognizable. Moreover, the trampling process would involve the leaving of his own footprints in evidence; which ...