twelve
o'clock
cried Smith . He was intensely excited now . `` I rely upon you to arrange something , Petrie . Mr. Weymouth '' -- he turned to our visitor -- `` I shall be with you this evening not later than twelve o'clock . '' Weymouth appeared to be greatly relieved . I asked him to wait whilst I prepared a draught for the patient . When he was gone : `` What do you think this knocking means , Smith ? ''