seven o'clock
`` You had a headache to-night -- good . You can make the excuse in the morning to visit the pharmacy in Shaftesbury Avenue . I need not tell you where you will really go . But tell them that word must be sent to Fritz Hoffer to take me off at the old spot at seven o'clock to-morrow night . '' `` Are you certain of a train that will get you there in time ? '' `` I shall not bother about trains , '' he replied . `` The Kilburn Rifles are doing coast duty there , and I will borrow Dennis Dashwood 's motor-bike ten minutes after their car has left for Charing Cross .