Two years after the peace, in 1643, the importance of the article which the marquis procured to be inserted into this treaty was rendered very apparent to the Spaniards, by its contributing materially to the failure of a third and last attempt by the Dutch to acquire possession of Chili. On this occasion their measures were so well taken, that if they had been seconded by the Araucanians they must have infallibly succeeded. They fitted out a numerous fleet, well provided with men, artillery, and military stores from Brasil, and took possession of Valdivia which had been deserted by the Spaniards for more than forty years, and at which place they intended to form an establishment from whence to conquer the rest of the kingdom. With this view, they immediately began to build strong forts at the entrance of the river, in order to secure possession of that important port, and invited the Araucanians to join them by the most flattering promises. But that gallant nation steadily refused to listen to the proposals, and adhering honourably to the stipulations in the treaty of Quillin, absolutely refused to supply them with provisions, of which they were much in want. The Cunchese, in whose territories Valdivia was situated, in consequence of the counsels of their Araucanian allies, likewise refused to enter into any connection or correspondence with the Dutch, or to supply them with provisions. In consequence of this refusal, being pressed by famine, and hearing that a combined army of Spaniards and Araucanians was in full march against them, the Dutch were compelled to abandon Valdivia in three months after taking possession. Soon after their retreat, the Marquis de Mancura, son to the viceroy of Peru, arrived at Valdivia in search of the Dutch with ten ships of war. To prevent the recurrence of a similar attempt, he fortified the harbour, and particularly the island at its entrance, which has ever since borne the name of his family title.
On the termination of the sixth year of his pacific government, the Marquis de Baydes was recalled from Chili, and Don Martin Muxica appointed governor in his place. He likewise succeeded in preserving the kingdom in a state of tranquillity; and the only unfortunate circumstance that occurred during his government was a violent earthquake, by which part of the city of St Jago was destroyed on the 8th of May 1647. His successor, Don Antonio de Acugna, had a very different fortune, as during his government the war was excited anew between the Spaniards and Araucanians; as will fall to be mentioned in the following section.
Renewal of the War with the Araucanians, and succinct Narrative of the History of Chili, from 1655 to 1787.