The Illustrious Prince by E. Phillips Oppenheim

Mr. James B. Coulson settled down to live what was, to all appearance, a very inoffensive and ordinary life. He rose a little earlier than was customary for an Englishman of business of his own standing, but he made up for this by a somewhat prolonged visit to the barber, a breakfast which bespoke an unimpaired digestion, and a cigar of more than ordinary length over his newspaper. At about eleven o'clock he went down to the city, and returned sometimes to luncheon, sometimes at varying hours, never later, however, than four or five o'clock. From that time until seven, he was generally to be found in the American bar, meeting old friends or making new ones.

On the sixth day of his stay at the Savoy Hotel the waiter who looked after the bar smoking room accosted him as he entered at his usual time, a little after half past four.