In the various treaties which were engineered from time to time between the Spaniards and the Araucanians, one of the most important clauses which the Spaniards invariably endeavoured to insert was to the effect that the Indians were to oppose to the utmost of their power by force of arms the founding of any foreign colony in the territories occupied by them. Thus the attitude of the Araucanians towards foreigners was apt to depend to some extent on whether they happened to be at peace or at war with their Spanish neighbours. It was owing to this, moreover, that the European adventurers found themselves attacked when they had very little reason to fear an onslaught. One of these instances occurred in 1638, when the natives murdered the survivors of a shipwrecked Dutch crew. There were times, on the other hand, when the enmity between the Indians and the Spaniards induced the former to render every assistance to the rovers who came, whether by accident or design, to their coasts. It is certain that the accounts of these foreigners retailed by the Spaniards to the natives were not of a nature to render the intruders popular in the eyes of the dusky southern dwellers.
During the chief part of the colonial era the town of Valdivia, in Southern Chile, was employed as a sort of convict station for the white criminals of Peru and Chile, and incidentally for a number of persons whose sole crimes were of a political order. These prisoners were employed in the erection of the fortifications of the spot, and the ruins which still exist attest the solidarity and the extent of the buildings. A large annual sum was wont to be allotted for the maintenance of these fortifications, and for other objects connected with the sustenance of both the prisoners and the garrison. It seems to have been necessary to expend only a very small proportion of this sum on the objects for which the allowance was originally intended, and from its enormous financial opportunities the post of Governor of Valdivia was one of the most sought after of any on the west coast of South America.