John Richard Green, History of the English People, Volume III
“ The treason of the Duke of Bourbon stirred a new hope of conquering France. Bourbon was Constable of France, the highest of the French nobles both from his blood and the almost independent power he wielded in his own duchy and in Provence. But a legal process by which Francis sought to recall his vast possessions to the domain of the crown threatened him with ruin; and driven to secret revolt, he pledged himself to rise against the king on the appearance of the allied armies in the heart of the realm. ”
