On the first of August, 1610, after having enjoyed Japanese hospitality for over a year, Vivero and his countrymen embarked for New Spain with twenty-three Japanese merchants, who were under the leadership of two noblemen named Tanaka Shosake and Shuya Ryusai. In Mexico City, where they arrived towards the end of the year, the Japanese were presented by Vivero to the viceroy, Don Luis de Velasco the Second, who received them well and stood sponsor at the baptism of at least one of the two Japanese noblemen, who returned to Japan bearing the Christian name Francisco and the viceroy’s family name, Velasco. The singularly noble conduct of the Japanese towards the ship-wrecked sailors at a time when all nations accepted the principle of “_jus littoris_” could but make a particularly deep impression upon the viceroy, who in the year 1600, for instance, had granted a concession to the inhabitants of the coast of the Gulf of Mexico, which legally authorized them to appropriate all ship-wrecked goods. Moved by gratitude, or as Father Caro prefers to state, by his ardent desire for the aggrandizement of New Spain, the viceroy determined to exert a prerogative usually confined to sovereigns, and to send an ambassador to Japan, entrusted with a letter in which he expressed to the Japanese rulers his gratitude and appreciation of the great charity and liberality towards his ship-wrecked countrymen. Mexican historians have differed as to the name of the ambassador appointed, but an original document preserved in the archives of the Indies proves, beyond a doubt, that it was General Sebastian Viscaino, who in this document is twice mentioned as being a son of the viceroy.[1] FOOTNOTE: [1] It has already been mentioned that the contents of this valuable document have not been discussed by Señor Ortega, Father Andrade or Señor Lera, who erroneously states in a footnote on page 23 of his monograph that the texts of the two letters from the Japanese sovereigns are contained in Vol. VIII of the collection of unedited documents; whereas this contains only the texts of Spanish letters addressed by General Viscaino to the emperor and shogun.