midnight
Close beside them the gurgle of the waters was soft and soothing , and the colour-touched clouds above the setting sun cast an unreal glow over the edges of the river bank . Koppy moved his eyes about uncomfortably on the day 's good-night . The mumblings of Werner brought him to the task in hand . `` We attack to-morrow night at midnight ! '' he announced . A gasp went up from the lips about him . Fanatic and bloodthirsty as they were , the imminence of the ordeal that was to requite their wrongs startled them .