You have been to the Riviera before, Georges? said Poirot to his valet the following morning.
George was an intensely English, rather wooden-faced individual.
Yes, sir. I was here two years ago when I was in the service of Lord Edward Frampton.
And today, murmured his master, you are here with Hercule Poirot. How one mounts in the world!

The Mystery of the Blue Train (1928)