The Stretton Street Affair by William le Queux

During the next few days I remained idle in the hotel, not daring to go out while it was light, and leaving the surveillance upon De Gex and his friend to my old friend Hambledon.

Each night we met at one cafe or another as we appointed, when he would report to me what he had witnessed during the day. It seemed that De Gex -- or Monsieur Thibon, as he preferred to call himself -- shared Suzor's private sitting-room and, curiously enough, he also did not go out in the daytime!