Gradually, as he pondered, the matter shaped itself into three main considerations.

First, there was Felix’s general bearing and manner. The Inspector had a long and varied experience of men who told the truth and of men who lied, and all his instincts led him to believe this man. He was aware that such instincts are liable to error—he had himself erred on more than one occasion in the past—yet he could not overlook the fact that Felix’s bearing, as far as his impression went, was that of a sincere and honest man. Such a consideration would not be a decisive factor in his conclusion, but it would undoubtedly weigh.

Secondly, there was Felix’s account of his actions in London. Of the truth of this the Inspector had already received considerable independent testimony. He reviewed the chain of events and was surprised to find how few statements of Felix were unsupported. His first visit to the Bullfinch had been described in almost similar terms by Broughton and by Huston in the wharf office. His call at the Fenchurch Street office and the ruse by which he obtained the shipping company’s headed notepaper had been testified to by Mr. Avery and his chief clerk, Wilcox. His description of the letter he had written to Harkness was certainly accurate from the Inspector’s own knowledge. His account of the removal of the cask and the shaking off of Harkness was in agreement with the statement of the latter and finally, Felix’s description of the removal of the cask to its present resting place was fully corroborated by Constable Walker.

There was practically no part of the statement unsupported by outside evidence. In fact, Inspector Burnley could not recall any case where so much confirmation of a suspect’s story was forthcoming. Weighing the matter point by point, he came to the deliberate conclusion that he must unreservedly believe it.

So much for Felix’s actions in London. But there was a third point—his actions in Paris, culminating in the letter of his friend. The letter. That was the kernel of the nut. Was it really written under the circumstances described? Had Le Gautier written it? Was there even such a man as Le Gautier? All this, he thought, it should not be difficult to find out. He would get some more information from Felix and if necessary slip across to Paris and put the statements to the test. He broke the silence.

‘Who is M. Le Gautier?’

‘Junior partner in the firm of Le Gautier, Fils, wine merchants, in the rue Henri Quatre.’

‘And M. Dumarchez?’

‘A stockbroker.’

‘Can you give me his address?’