‘Inquiries have also been made about Felix. It turns out he is an artist or designer in Messrs. Greer and Hood’s, the advertisement and poster people of Fleet Street. He is not married, but keeps an elderly servant-housekeeper. This woman was on a fortnight’s holiday from the 25th of March to the 8th of this month.

‘So much for London,’ continued M. Chauvet. ‘Now, let us see what we have still to do. First, that lady’s maid at Dijon must be interviewed. I think, Lefarge, you might do that. To-morrow is Sunday. Suppose you go to-morrow. You can sleep at Dijon, and get back as early as possible on Monday. Then, Mr. Burnley, that matter of the statue sent to M. Boirac must be gone into. Perhaps you would be good enough to make inquiries at Dupierre’s on Monday morning, and please keep in touch with me by phone. I will look into some other points, and we shall meet here at the same time that evening.’

The detective took the Metro at Châtelet, Burnley going west to his hotel in the rue Castiglione, and Lefarge east to the Gare de Lyons.

On Monday morning Burnley called to see M. Thomas at the showroom in the Boulevard des Capucines.

‘I’m back again, M. Thomas,’ he said, as they greeted one another. He explained what had been learned about the casks at the Gare St. Lazare, continuing, ‘So you see, two must have been sent out. Now, can you give me any information about the sending out of the second cask?’

‘Absolutely none, monsieur,’ returned Thomas, who was evidently amazed at this new development, ‘I am quite positive we only sent one.’

‘I suppose it’s impossible that Felix’s order could have been dealt with twice in error, once by you here, and once by the head office in the rue Provence?’

‘I should say quite, because they do not stock the good work there, it is all stored and dealt with here. But if you like I’ll phone the head office now, and make quite sure.’

In a few minutes there was a reply from M. Thévenet. No cask of any kind had been sent out from the rue Provence establishment on or about the date mentioned, and none at any time to Felix.

‘Well, M. Thomas, it’s certain, is it not? that one of your casks was sent by Rouen and long sea about the 1st instant. Do you think you could let me have a list of all the casks of that size that were out of your yard on that date? It must have been one of them.’