One evening, on our asking the landlord who was this obscure, solitary and belated diner, "What!" he exclaimed, "do you mean to say you don't know the famous painter Elstir?" Swann had once mentioned his name to me, I had entirely forgotten in what connexion; but the omission of a particular memory, like that of part of a sentence when we are reading, leads sometimes not to uncertainty but to a birth of certainty that is premature.