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An Argentine diplomat blew a whistle in a New Delhi nightclub one evening last week. Results: most of the protocol officers in India's foreign office lost their Saturday afternoon holiday, armed policemen were called out to patrol the Imperial Hotel, a bearded Briton was booked for assault and Prime Minister Jawaharlal Nehru found himself in the midst of an international incident.

The whistle was one of those which nightclub owners the world over love to pass out to their customers. Tootled shrilly by Argentine Ambassador Oscar Tascherest in the Imperial's supper club, it profoundly irritated the girl companion of a...