What more was there to be asked after that? I accompanied him until, as we drew level with the Hotel des Quatre Saisons , he suddenly nodded to me and disappeared. For myself, I returned home, and came to the conclusion that, even had I met him at two o’clock in the afternoon, I should have learnt no more from him than I had done at five o’clock, for the reason that I had no definite question to ask. It was bound to have been so. For me to formulate the query which I really wished to put was a simple impossibility.