six o'clock
She struck a match , lighted them at one corner , and saw to it that they were entirely consumed . When Barbara had finished with a note , or a circular , or a letter , Sherlock Holmes himself could not have recovered the contents or the name of the sender . Banking on this habit , Blizzard wrote Barbara a note and sent it to her father 's house by a man he could trust . She received the note at six o'clock , while she was resting prior to dressing and dining out . It read as follows : 81 Marrow Lane . DEAR MISS FERRIS : My affairs do n't seem to be prospering here , so I am going away . I am sorry the Bust is n't finished .