“ On both occasions he had played the peacemaker, and this sympathetic part, combined with his own pleasant manners and handsome person with bright eyes and abundant raven-black hair—a complete contrast to the fair complexions of the Habsburgs—made him a popular favourite. In 1656 he was sent to command in Flanders, in combination with the prince of Condé, then in revolt against his own sovereign. At the storming of the French camp at Valenciennes in 1656, Don John displayed brilliant personal courage at the head of a cavalry charge. ”

“ When, however, he took a part in the leadership of the army at the Dunes in the battle fought against Turenne and the British forces sent over by Cromwell in 1658, he was completely beaten, in spite of the efforts of Condé, whose advice he neglected, and of the hard fighting of English Royalist exiles. ”