The richly varied lives of the Martin brothers reflected the many upheavals of Britain in the age of Industrial Revolution. Low-born and largely unschooled, they were part of a new generation of artists, scientists and inventors who witnessed the creation of the modern world. William, the eldest, was a cussedly eccentric inventor who couldn't look at a piece of machinery without thinking about how to improve it; Richard, a courageous soldier, fought in the Peninsular War and at Waterloo; Jonathan, a hellfire preacher tormented by madness and touched with a visionary genius reminiscent of William Blake, almost burned down York Minster in 1829; while John, the youngest Martin, single-handedly invented, mastered and exhausted an entire genre of painting, the apocalyptic sublime, while playing host to the foremost writers, scientists and thinkers of his day. In The Prometheans Max Adams
