"As you rightly suggest, it is a trick, Contessa," he said, in a tone rather more conciliatory, and for the first time speaking without any show of politeness. "Within the past ten days the situation in Rome has undergone an entire change, although the journals know nothing; and in consequence I find Castellani, who has for years been my friend and supporter, is now one of my bitterest opponents. If there is a change of government he would no doubt be appointed Foreign Minister in my place." "Well, you don't fear him, surely?" she said. "You are Minister, and can recall him at any moment." "No. Castellani holds a certain document which, if produced, must cause the overthrow of the Government, and perhaps the ruin of our country," he answered in deep earnestness. "Before long, in order to clear himself and place himself in favour, he must produce this paper, and if so the revelations will startle Europe." "Well, that is nothing to me," she said coldly. "It is entirely your affair." "Listen!" he exclaimed eagerly. He was now confiding to her one of the deepest secrets of the political undercurrent. "This document is in a sealed blue envelope, across the face of which a large cross has been drawn in blue pencil. Remember that. It is in the top left-hand drawer in the Ambassador's writing-table in his private room. You know the room; the small one looking out into Grosvenor Square. You no doubt recollect it when you were visiting there two years ago." "Certainly," she contented herself with replying, still puzzled at the strangeness of his manner. The wind moaned mournfully through the bare branches above them. "You are friendly with Castellani's daughter," he went on earnestly. "Call to-morrow with the object of visiting her, and then you must make some excuse to enter that room alone." "You mean that I must steal that incriminating paper?" she said. He nodded. "Impossible!" she replied decisively. "First, I don't intend to run any risk, and, secondly, I know quite well that nobody is allowed in that room alone. The door is always kept locked." "There are two keys," he interrupted. "Here is one of them. I secured it yesterday." "And in return for this service, what am I to receive?" she inquired coldly, sitting erect, without stirring a muscle. "In return for this service"--he answered gravely, his dark eyes riveted upon hers--"in return for this service you shall name your own price." CHAPTER TWENTY FOUR. BY STEALTH.