Complex sentence: In 1852 he escaped and made his way to the United States, where he settled in New York City, where he studied law, worked as a journalist, and traveled to present lectures on the Irish cause.
Split into simpler sentences: In 1852 he escaped and made his way to the United States, where he settled in New York City. There Meagher studied law, worked as a journalist, and traveled to present lectures on the Irish cause.