midnight
He had rested on the little platform outside the cavern 's vineyard far below , and upwards , at the narrow ribbon of sky overhead . Then he had gone within , to examine what was left of the old masonry , the phallic column and other relics of the past . That was ten days ago . Now he meant to follow Keith 's advice and go there at midnight . The moon was full . `` This very night I 'll go , '' he thought . All was not well with Denis .