'I thought you said he didn't speak.'
'He did not speak to the American, sir, but he said to the cabman, "Drive to the Madeleine as quickly as you can."'
'Describe the man.'
'He was a head shorter than the American, wore a black beard and moustache rather neatly trimmed, and seemed to be a superior sort of artisan.'
'You did not take the number of the cab. Should you know the cabman if you saw him again?'
'Yes, sir, I think so.'
Taking this fellow with me I returned to the now nearly empty auction room and there gathered all my men about me. Each in his notebook took down particulars of the cabman and his passenger from the lips of my incompetent spy; next I dictated a full description of the two Americans, then scattered my men to the various railway stations of the lines leading out of Paris, with orders to make inquiries of the police on duty there, and to arrest one or more of the four persons described should they be so fortunate as to find any of them.
I now learned how the rogue with the pistols vanished so completely as he did. My subordinate in the auction room had speedily solved the mystery. To the left of the main entrance of the auction room was a door that gave private access to the rear of the premises. As the attendant in charge confessed when questioned, he had been bribed by the American earlier in the day to leave this side door open and to allow the man to escape by the goods entrance. Thus the ruffian did not appear on the boulevard at all, and so had not been observed by any of my men.
Taking my futile spy with me I returned to my own office, and sent an order throughout the city that every cabman who had been in the Boulevard des Italiens between half-past two and half-past three that afternoon, should report immediately to me. The examination of these men proved a very tedious business indeed, but whatever other countries may say of us, we French are patient, and if the haystack is searched long enough, the needle will be found. I did not discover the needle I was looking for, but I came upon one quite as important, if not more so.
It was nearly ten o'clock at night when a cabman answered my oft-repeated questions in the affirmative.