The byways of espionage are not populated by the brash and colourful adventurers of fiction. A man who, like Smiley, has lived and worked for years among his country’s enemies learns only one prayer: that he may never, never be noticed. Assimilation is his highest aim, he learns to love the crowds who pass him in the street without a glance; he clings to them for his anonymity and his safety. His fear makes him servile – he could embrace the shoppers who jostle him in their impatience, and force him from the pavement. He could adore the officials, the police, the bus conductors, for the terse
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