five o'clock
`` However , I am not fond of motoring . '' I do n't know whether someone punctured an air cushion just then , or whether it was me heavin ' a sigh of relief . `` Ai n't you ? '' says I. `` But Vee 's strong for it , and if you do n't mind -- '' `` My niece is writing letters , '' says Aunty , `` and asked not to be disturbed until after five o'clock . '' `` But in this case , '' I goes on , `` maybe she 'd sidetrack the letters if you 'd send up word how -- '' `` Young man , '' says Aunty , settin ' her chin firm , `` I think you are quite aware of my attitude . Your persistent attentions to my niece are wholly unwelcome . True , you are no longer a mere office boy ; but -- well , just who are you ? ''