"He wrote much in the language of the Indians and other things in the language of the Chinese for whom he had printed in their language and characters a memorial upon the Christian life, with other brief tracts of prayer and meditation, in preparation for the holy sacraments, of confession and the sacred communion. He was an enemy of sloth, and so worked much in Chinese, in which he wrote a practically new grammar of the Chinese language, a vocabulary, a manual of confession and many sermons, in order that those who had to learn this language might find it less difficult." [116] Medina [117] records these various works as Manila imprints of unknown date, and to this indefinite information about them we can add nothing positive. However, it is apparent that some time before 1606, when Nieva died on his way to Mexico, he had had books printed, and since they were in Chinese they must have been printed from wood-blocks, for at that early date it would have been impossible to have cast the number of characters necessary to print in Chinese with movable type. With Nieva was Maldonado, or San Pedro Martyr. He had been one of the first associates of Benavides in the first Chinese mission at Baybay, but after the arrival of Cobo he had been sent by order of the first chapter to Pangasinan. When Cobo was appointed acting provincial San Pedro Martyr was again assigned to the Chinese ministry. He had learned Tagalog, and after his return to the Parian "he learned more words of the Chinese language than any other member of the order, though he was not successful with the pronunciation." [118] On May 31, 1592, the Governor received a letter from the Emperor of Japan demanding that an ambassador be sent to offer him the fealty of the Philippines. Juan Cobo, as the best speaker of Chinese, was chosen to represent the Spaniards, and he left Manila on July 29, 1592. After successfully convincing the Japanese Emperor of the amity of the Spaniards, he left to come back to Manila, but his ship was wrecked in November on the coast of Formosa, and there Cobo was killed by hostile natives. Meanwhile Benavides had gone back to Spain with Bishop Salazar in 1591, and did not return to the Philippines until after his appointment as Bishop of Nueva Segovia in 1595.