eleven o’clock
`` Some lad ! '' commented Tuppence , with a nod of approval . `` You might say that the young woman could come in right away . You let me know , and if it 's O.K. I 'll be round to-morrow at eleven o'clock . '' `` Where am I to let you know to ? '' `` _ Ritz _ , '' replied Tuppence laconically . `` Name of Cowley . ''