The Sign of Silence by William le Queux

It being the luncheon hour, Fremy and myself ate our meal at the highly popular restaurant, the Taverne Joseph, close to the Bourse, where the cooking is, perhaps, the best in Brussels and where the cosmopolitan, who knows where to eat, usually makes for when in the Belgian capital.

After our coffee, cigarettes, and a "triple-sec" each, we strolled round to the General Post Office. As we approached that long flight of granite steps I knew so well, a poor-looking, ill-dressed man with the pinch of poverty upon his face, and his coat buttoned tightly against the cold, edged up to my companion on the pavement and whispered a word, afterwards hurrying on.