“Why, then, we’ll make an exchange,” said Proteus. “Here, take you this. And here is my hand for my true constancy. If ever I do not remember you for a single hour, Julia, the next hour let some evil mischance torment me for my forgetfulness.” And so, with many protestations of love and fidelity, Proteus started to rejoin his friend Valentine at Milan, and Julia was left behind at Verona. “Who is Silvia?” Valentine had spoken many wise words to Proteus on the folly of being in love, but he had not been long in Milan before he was in just the same sad plight that he had cautioned his friend against. The Duke of Milan had a beautiful daughter called Silvia, and it was with her that Valentine fell deeply in love. She returned his affection, and they became secretly betrothed, but they dared not let this be known, for her father favoured another suitor, Sir Thurio, a rich and well-born gentleman, but foolish and extremely vain. The Duke of Milan, as was the custom in those days, thought himself at perfect liberty to dispose of his daughter in marriage as best pleased himself, with but scant regard for her own feelings on the subject. He suspected there was some love between Silvia and Valentine, and saw many little things when they thought him blind. He often determined to forbid Valentine his Court and his daughter’s company, but, fearing that his jealousy might perhaps be leading him into error, and that he might bring disgrace unworthily upon Valentine, he resolved not to act rashly, but by gentle means to try to discover the truth. In the meanwhile he kept a strict watch over Silvia, and, fearing some attempt on the part of the young lovers to escape secretly, he gave directions that Silvia should be lodged in an upper tower, the key of which was brought every night to himself. Matters were in this state when, to Valentine’s great joy, Proteus arrived at the Court of Milan. In the full warmth of his generous heart, Valentine lavished praises of his friend to the Duke of Milan and to Silvia, and for the sake of the love she bore to Valentine Silvia gave Proteus a hearty welcome. But what a base return Proteus made for the kindness heaped on him! In spite of the devotion which he had professed for Julia, in spite of his lifelong friendship with Valentine, Proteus no sooner beheld Silvia than he imagined himself desperately in love with her. All thought of loyalty and honour was recklessly flung aside. He knew he was behaving shamefully. He remembered his faithful lady in Verona; he called to mind the duty he owed his dear friend Valentine. But for the moment his weak and selfish nature carried him beyond control. He had no thought but to gratify his own desires, and he determined to throw over Julia, and to win Silvia for himself at whatever cost of treachery and dishonour.