two o’clock in the
morning
`` Vampires are cold , all but the blood . '' `` What a fool I am ! '' rejoined Heinrich . `` But you know we have been hearing such horrors lately that a fellow may be excused for shuddering a little when a pale-faced apparition tells him at two o'clock in the morning that he is a vampire , and thirsty , too . '' Karl told him the whole story ; and the mental process of regarding it for the sake of telling it , revealed to him pretty clearly some of the treatment of which he had been unconscious at the time . Heinrich was quite sure that his suspicions were correct . And now the question was , what was to be done next ?