I took aside one of my own men in plain clothes and said to him,—
'You have seen the American who has bought the necklace?'
'Yes, sir.'
'Very well. Go outside quietly, and station yourself there. He is likely to emerge presently with the jewels in his possession. You are not to lose sight of either the man or the casket. I shall follow him and be close behind him as he emerges, and you are to shadow us. If he parts with the case you must be ready at a sign from me to follow either the man or the jewels. Do you understand?' 'Yes, sir,' he answered, and left the room.
It is ever the unforeseen that baffles us; it is easy to be wise after the event. I should have sent two men, and I have often thought since how admirable is the regulation of the Italian Government which sends out its policemen in pairs. Or I should have given my man power to call for help, but even as it was he did only half as well as I had a right to expect of him, and the blunder he committed by a moment's dull-witted hesitation—ah, well! there is no use of scolding. After all the result might have been the same.
Just as my man disappeared between the two folding doors the official from the Ministry of the Interior entered. I intercepted him about half-way on his journey from the door to the auctioneer.
'Possibly the cheque appears to be genuine,' I whispered to him.
'But certainly,' he replied pompously. He was an individual greatly impressed with his own importance; a kind of character with which it is always difficult to deal. Afterwards the Government asserted that this official had warned me, and the utterances of an empty-headed ass dressed in a little brief authority, as the English poet says, were looked upon as the epitome of wisdom.
'I advise you strongly not to hand over the necklace as has been requested,' I went on.
'Why?' he asked.