‘I’ve been into this case as far as is possible this side of the Channel, Mr. Clifford,’ he announced. ‘I was thinking of crossing to Paris to-night.’

‘Good. And what do you think of it all?’

‘Well, sir, it’s rather soon to give an opinion, but I’m afraid we’re up against a tough proposition.’

‘In what way?’

‘The case against Felix, sir. It’s pretty strong. Of course, I expect we’ll meet it all right, but it’ll take some doing. There’s not much in his favour, if you think of it.’

‘What about the shock he got when the cask was opened? Have you seen the doctor about it?’

‘Yes. He says the thing was genuine enough, but, sir, I’m afraid that won’t carry us so far as you seem to think.’

‘To me it seems very strong. Look at it this way: the essence of a shock is surprise; the surprise could only have been at the contents of the cask; therefore Felix did not know the contents; therefore he could not have put the body in; therefore surely he must be innocent?’

‘That sounds all right, sir, I admit. But I’m afraid a clever counsel could upset it. You see, there’s more than surprise in a shock. There’s horror. And it could be argued that Felix got both surprise and horror when the cask was opened.’

‘How, if he knew what was in it?’