Question

Which rhetorical device is used in this excerpt from "The Extraordinary American" by G. K. Chesterton?

He was a lean brown man, having rather the look of a shabby tropical traveller, with a grey moustache and a lively and alert eye. But the most singular thing about him was that the front of his coat was covered with a multitude of shining metallic emblems made in the shape of stars and crescents. I was well accustomed by this time to Americans adorning the lapels of their coats with little symbols of various societies; it is a part of the American passion for the ritual of comradeship.