They waited while Bradfield spoke to the policemen and showed them his red card. His German sounded very English in tone but the grammar was faultless. The policeman nodded, saluted and they took their leave. Slowly they returned to the Embassy through the sullen faces of the aimless crowd.

'Extraordinary place for Leo to spend the night,' Crabbe muttered, but Turner was fingering the gunmetal key in the OHMS envelope in his pocket, and still wondering, for all his sense of failure, whose door it had unlocked.