Among the young ladies of Philadelphia who graced the _Mischianza_, was the gay and brilliant Margaret Shippen, who afterward became the wife of Arnold. Andrè was a frequent guest at her father's table, and Margaret continued her acquaintance with him, by epistles, even after her marriage. Through this channel her husband opened a correspondence with Sir Henry Clinton, the Commander-in-chief of the British forces in America, and then quartered in New York. For a long time Arnold's letters were vague. His advances were slow and cautious. He assumed the name of _Gustavus_, and couched his letters in commercial phrases. Profound secrecy was observed by both. Arnold's wife, it is believed, was ignorant of the true intent of her husband's letters, and Clinton had no other confidant than Andrè and Colonel Beverly Robinson. The latter was the son-in-law of Frederick Phillipse, one of the largest landholders in America. Twenty years before, Washington, then a Virginia colonel, had enjoyed the hospitalities of his house, and there became enamored of Mary Phillipse, the betrothed of Roger Morris, his old companion in arms in the battle of Monongahela. Of course his suit was rejected, and the young soldier gave his heart and hand to a charming widow of his own province. Robinson had an extensive acquaintance among the American officers. He early espoused the patriot cause, even as early as the era of the Stamp Act; but when the Declaration of Independence was promulgated, he was unwilling to accede to so bold a measure as the dismemberment of the British Empire, and he took up arms for the king. [Illustration: Bev. Robinson]