Richard, 3rd Duke of York is frequently used to recall the colours of the rainbow with the mnemonic 'Richard Of York Gave Battle In Vain', wrongly believed to be the Grand Old Duke of York who had 10,000 men, or mistaken for his youngest son, Richard III. The son of a traitor, he inherited a dukedom aged four, became the wealthiest man in England at thirteen and later rebelled against his king, and if he is remembered, it is as a man who ignited the...