Arnold escaped to New York City and Peggy followed. They traveled together to London at the end of 1781, where she established a home and Arnold rebuilt a trading business. In 1787, she joined him in Saint John, New Brunswick, where his difficulties with local businessmen forced them to return to London in December 1791. Arnold died in 1801, after which she had to settle his business affairs and pay off his debts. She died in 1804, having borne five children who survived infancy.