It made no difference whether the sun was shining overhead or the stars twinkled faintly or not at all. The rain might descend in torrents, hail, snow and sleet might batter horse and rider like fine birdshot, and the temperature might drop below zero, or throb with heat, still rider and horse who were like one creature must plunge on and ever on, so long as muscle and nerve could stand the terrific strain.[B]