Alvar nunez ordered two brigantines to be equipped with all diligence, and to be loaded with provisions and other commodities; and having manned them with some of the former colonists of Buenos Ayres who were acquainted with the navigation of the Paraná, he sent them to relieve the one hundred and forty Spaniards who were to have embarked at St. Catalina in the ship Capitana for Buenos Ayres; for, owing to the abandonment of this port, these people would be exposed to great danger. He ordered that the port should be immediately rebuilt in the most convenient place, as the colony was necessary for the safety and welfare of all the Spaniards in the province, as well for those who might come there in future, ships being obliged to anchor in this part of the river; here, too, brigantines have to be built to navigate the river for three hundred and fifty leagues to the town of Ascension.

The first two brigantines set out on the sixteenth of April. After they had started, the governor ordered two more to be built, and laden with provisions and people, to proceed also to the relief of the Spaniards, and to re-establish the port of Buenos Ayres. He gave special injunctions to the captains of these two vessels to treat the natives of the Paraná with kindness, and induce them by fair means to acknowledge the sovereignty of the King.