This man, who had inserted in the authentic formula and charter of his Institute that watchword of his movements, "Defence and Advance"; who had taken the whole world for the field of his operations, in defending and advancing; this cavalier of a new military type, who had only to show himself upon the field to gather around him the flower of youth as well as mature age, from college and university, from doctor's chair and prince's throne, left behind him, as the work of fifteen years from the foundation of the Order, about one hundred colleges and houses, distributed into twelve Provinces. The territorial divisions were named, after their chief centres, the Provinces of Portugal, Castile, Andalusia, Aragon, Italy, Naples, Sicily, Upper Germany, Lower Germany, France, Brazil, and the East Indies. Individuals under his orders had overrun Ireland, penetrated into Scotland, into Congo, Abyssinia, and Ethiopia. The East Indies, first traversed by Francis Xavier either on foot, or in unseaworthy vessels, signified the whole stretch of countries from Goa and Ceylon on the West, to Malacca, Japan, and the coast of China on the East. Some of this activity might be credited to apostolic zeal alone, were it not that, wherever the leaders advanced into the heart of a new country, it was always with the purpose, and generally with the result, that the country was to be occupied with educational institutions. De Backer notes this in another connection, when, in the preface to his great work of bibliography, "The Library of Writers of the Company of Jesus," he says: "Wherever a Jesuit set his foot, wherever there was founded a house, a college, a mission, there too arose apostles of another class, who labored, who taught, who wrote."[45] What this means, with regard to its strategic value, there is no need of our being told. The Duke of Parma, writing, in 1580, from the seat of war in the Netherlands to Philip II of Spain, said: "Your Majesty desired that I should build a citadel in Maestricht; I thought that a college of the Jesuits would be a fortress more likely to protect the inhabitants against the enemies of the Altar and the Throne. I have built it."[46] Sixty years later, after the long generalship of Aquaviva, who during 34 years governed the Order with the ability of another Ignatius, the number of colleges was 372. Well might his immediate successor, Mutius Vitelleschi, writing to the whole Society about the Education of Youth, speak of the "beautiful and precious mass of gold, which we have in our hands to form and finish."[47]