John Tawell was a sincere Quaker but a sinning one. Convicted of forgery, he was transported to Sydney, where he opened Australia's first retail pharmacy and made a fortune. When he returned home to England after fifteen years, he thought he would be welcomed; instead he was shunned. Then on New Year's Day 1845 Tawell boarded the 7:42 pm train to London Paddington. Soon, men arrived chasing a suspected murderer - but the 7:42 had departed...