five o'clock
`` Two detective-sergeants . '' `` It 's important that they should be there . Please also ask the manager not to disturb us on any account . '' And , when Morisseau returned , Rénine closed the door , took his stand in front of Dutreuil and , speaking in a good-humoured but emphatic tone , said : `` It amounts to this , young man , that the ladies saw nothing of you between three and five o'clock on that Sunday . That 's rather a curious detail . '' `` A perfectly natural detail , '' Dutreuil retorted , `` and one , moreover , which proves nothing at all . '' `` It proves , young man , that you had a good two hours at your disposal . ''