An excerpt from the Simon Marmion Book of Hours depicting the martyrdom of St Catherine of Alexandria. St Catherine was tortured on a spiked wheel and became the patron saint of those who worked with wheels – wheelwrights (who made wheels for carriages and pushcarts), millers (who used millwheels to grind the grain), and the spinners of thread (who used spinning-wheels). Her legend dates only from the 9th century.