The trait first showed itself in a dozen incidents of little more than nervousness--his warning to a taxi-driver against fast driving, in Chicago; his refusal to take her to a certain tough cafe she had always wished to visit; these of course admitted the conventional interpretation--that it was of her he had been thinking; nevertheless, their culminative weight disturbed her. But something that occurred in a San Francisco hotel, when they had been married a week, gave the matter certainty.