"Yes, that would not be a very difficult task, seeing that neither an army nor a fleet could exist for twelve hours with two or three of them hovering above it," replied Arnold. The trial over, Arnold set to work and took the model partly to pieces for packing up; and while he was putting it away in the old sea-chest, Colston counted out ten sovereigns and laid them on the table. Hearing the clink of the gold, Arnold looked up and said-- "What is that for? A sovereign will be quite enough to get me out of my present scrape, and then if we come to any terms to-night it will be time enough to talk about payment." "The Brotherhood does not do business in that way," was the reply. "At present your only connection with it is a commercial one, and ten pounds is a very moderate fee for the privilege of inspecting such an invention as this. Anyhow, that is what I am ordered to hand over to you in payment for your trouble now and to-night, so you must accept it as it is given--as a matter of business." "Very well," said Arnold, closing and locking the chest as he spoke, "if you think it worth ten pounds, the money will not come amiss to me. Now, if you will remain and guard the household gods for a minute, I will go and pay my rent and get a cab." Half an hour later his few but priceless possessions were loaded on a four-wheeler and Arnold had bidden farewell for ever to the dingy room in which he had passed so many hours of toil and dreaming, suffering and disappointment. Before lunch time they were safely bestowed in a couple of rooms which Colston had engaged for him in the same building in which his own rooms were. In the afternoon, among other purchases, a more convenient case was bought for the model, and in this it was packed with the plans and papers which explained its construction, ready for the evening journey. The two friends dined together at six in Colston's rooms, and at seven sharp his servant announced that the cab was at the door. Within ten minutes they were bowling along the Embankment towards Westminster Bridge in a luxuriously appointed hansom of the newest type, with the precious case lying across their knees. "This is a comfortable cab," said Arnold, when they had gone a hundred yards or so. "By the way, how does the man know where to go? I didn't hear you give him any directions." "None were necessary," was the reply. "This cab, like a good many others in London, belongs to the Brotherhood, and the man who is driving is one of the Outer Circle. Our Jehus are the most useful spies that we have. Many is the secret of the enemy that we have learnt from, and many is the secret police agent who has been driven to his rendezvous by a Terrorist who has heard every word that has been spoken on the journey." "How on earth is that managed?"