the famous Indian head-wiggle. The weeks I’d spent in Bombay with Prabaker had taught me that the shaking or wiggling of the head from side to side—that most characteristic of Indian expressive gestures—was the equivalent of a forward nod of the head, meaning Yes. I’d also discerned the subtler senses of I agree with you, and Yes, I would like that. What I learned, on the train, was that a universal message attached to the gesture, when it was used as a greeting, which made it uniquely useful.
