once. Mind you, I don't say that murder was intended in the first instance; but will presume that there was a struggle. The thief probably lost his temper, and perhaps Mr. Skidmore irritated him. Now, the rest was easy. It was easy to pack up the gold in leather bags, each containing a thousand sovereigns, and to drop them along the line at some spot previously agreed upon. I have no doubt that the murderer and his accomplices traveled many times up and down the line before the details were finally settled. Any way, there was no risk here. The broken packing cases were pitched out also, probably in some thick wood. Or they might have been weighted and cast into a stream. Are you interested?"

The Marquis gurgled. He had some difficulty in speaking.

"A little dangerous," he said. "Our ingenious friend could not possibly screw himself down in the coffin after returning to his compartment. And have you perceived the danger of discovery at Lydmouth?"

"Precisely," Merrick said drily. "It is refreshing to meet with so luminous a mind as yours. There were many dangers, many risks to take. The train might have been stopped, lots of things might have happened. It would be far better for the man to leave the express. And he did so!"

"The express at top speed! Impossible!"

"To the ordinary individual, yes. But then, you see, this was not an ordinary individual. He was—let us suppose—an acrobat, a man of great nerve and courage, accustomed to trapeze work and the use of the diving net."

"But Colonel, pardon me, where does the net come in?"

"The net came in at a place near Little Warlingham, on the Norfolk coast. There are miles of net up there, trap and flight nets close by the side of the line. These nets are wide and strong; they run many furlongs without supports, so that an acrobat could easily turn a somersault on to one of these at a given spot without the slightest risk. He could study out the precise spot carefully beforehand—there are lightships on the sands to act as guides. I have been down to the spot and studied it all out for myself. The thing is quite easy for the class of man I mean. I am not taking any great credit to myself, because I happened to see the body of the man who essayed that experiment. I recognized him for——"

"You recognized him! You knew who he was?"

"Certainly. He was Luigi Bianca, who used to perform in London years ago, with his brother Joseph, on the 

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