midnight
There was no anger , no attempt at dramatics , in Hartnett 's voice . He looked quietly up at our host . `` Dr. Strange , '' he said at length , `` I have come to you for your assistance . Last night , some time after midnight , Franklin White was strangled to death . He was murdered , according to substantial evidence , by the girl he was going to marry -- Margot Vernee . I come to you because you know this girl rather well , and can perhaps help Scotland Yard in finding her motive for killing White . '' Michael Strange said nothing .