Marie Boas went to England from the US, "to work on Robert Boyle's papers, and met Hall, who was working on Isaac Newton's. In 1957 she returned to the University of California, Los Angeles; and in 1959 Hall, whose first marriage had ended in divorce, joined her there and they were married. Two years later they went to Indiana University. In 1963 they were invited back to London, to Imperial College, where Hall became the first professor of the history of science and she senior lecturer. There they trained many graduate students."