The battle between the Spanish Armada and Sir Francis Drake's naval squadrons was perhaps the defining event of the late 16th century. The struggle for the heart and soul of Europe and the wealth of the New World sucked in the great powers. As Felipe of Spain and Elizabeth of England played out their power politics, the quarrel spilled over to the very edge of the continent. On mystical Eilean Mhor, braving the vastness of the mighty Atlantic, it...