Nobody's Man by E. Phillips Oppenheim — Read

Tallente found a distant connection of his waiting for him in his rooms, on his return from the House at about half-past six, -- Spencer Williams, a young man who, after a brilliant career at Oxford, had become one of the junior secretaries to the Prime Minister. The young man rose to his feet at Tallente's entrance and hastened to explain his visit.

"You'll forgive my waiting, sir," he begged. "Your servant told me that you were dining out and would be home before seven o'clock to change."