In 1763, an 11-year-old boy named Thomas Chatterton began publishing mature works of poetry. Before long, he was fooling the literary world by passing his work off as that of a non-existent 15th-century poet named Thomas Rowley-which he did until unmasked by Horace Walpole. Brought up in poverty and without a father, he studied furiously and went on to try and earn a living from his writing. After impressing the likes of the Lord Mayor, William Beckford...