Some days after the establishment of Sarah and her brother at the court of the Grand Duke, Polidori became a close ally of Seyton's. The doctor confessed to himself, with delectable cynicism, that he felt a natural affinity for rogues and villains, and so he said that without pretending to discover the end which Sarah and her brother desired to achieve, he was attracted towards them by a sympathy so strong as to lead him to imagine that they plotted some devilish purpose. Some questions of Seyton's as to the disposition and early life of Rodolph, questions which would have passed without notice with a person less awake to all that occurred than the doctor, in a moment enlightened him as to the ulterior aims of the brother and sister; all he doubted was, that the aspirations of the Scotch lady were at the same time honourable as well as ambitious. The arrival of this lovely young woman appeared to Polidori a godsend. Rodolph's mind was already inflamed with amorous imaginings; Sarah might become, or be made, the delicious reality which should substantiate so many glorious dreams. It was not to be doubted but that she would secure an immense influence over a heart submitted to the witching spell of a first love. The doctor instantly laid his plan to direct and secure this influence, and to make it serve also as the means of destroying Murphy's power and reputation. Like a skilful intriguer, he soon informed the aspiring pair that they must come to an understanding with him, as he alone was responsible to the Grand Duke for the private life of the young prince. Sarah and her brother understood him in a moment, although they had not told the doctor a syllable of their secret designs. On the return of Rodolph and Murphy, all three, combined by one common intent, tacitly leagued against the squire, their most redoubtable enemy. * * * * *