midnight
It sounded like a subterranean music . A shudder ran down the backs of the musketeers in the ditch and their teeth chattered . `` An accursed signal that ! '' When the midnight rider reached the churchyard , he dismounted from his horse , bound it to an elderberry tree , and replied to the signal with a trumpet-blast of his own , whereupon a spectral flame shot up among the tombstones . `` Do you hear that ? The devils are answering one another . '' `` It is either the devil or Valentine Kalondai . ''