Few letters have been so enthusiastically received & so widely diffused as those of the sixteenth-century Jesuit missionary & Saint, Francis Xavier. Written from India, the Indonesian archipelago, Japan, & the island of Sancian off the coast of China, these letters were copied, recopied, translated into Latin, German, French, & other languages, & frequently printed for wider circulation. They are filled with information on newly discovered lands & cultures, & they are filled with the missionary spirit, the zeal for the honor & glory of God, which animated the whole of Xavier's life & work. They constitute a religious classic & an historical resource heretofore unavailable in English. Francis Xavier was one of the first companions & followers of Ignatius Loyola, the founder of the Society of Jesus (Jesuits). In 1540, he set off as a missionary to southern Asia, where in the midst of ten years of ceaseless labor he produced the 138 letters & instructions that this book contains. The translator of this highly readable English version, M. Joseph Costelloe, S.J., is well known in scholarly circles for his masterful translation of the definitive four-volume biography, FRANCIS XAVIER, HIS LIFE, HIS TIMES by Georg Schurhammer, S.J., published by the Jesuit Historical Institute in Rome.