Cortés retained his rank as captain-general after the audiencia was established. The conqueror was in reality reduced to a secondary position, and he was compelled repeatedly to acknowledge the supremacy of the audiencia. His commission was recognized by the tribunal on its arrival, but soon after its establishment the oidores exhibited a royal order requiring that "Cortés, in all his operations, should consult the president and oidores and act only on their approval." [589] Even in his field, as commander of the military forces, Cortés was subordinated to the tribunal, and the audiencia and the conqueror quarrelled bitterly over practically all matters which presented themselves for solution. The audiencia had been created to meet extraordinary and unusual conditions. It was the business of the tribunal to correct the abuses which had previously been inflicted on the colony by Cortés, and it did so. On the arrival of Mendoza in 1535, however, the audiencia surrendered the control of administrative affairs, and it did not assume them again, except in the regular way in conjunction with the viceroy, until it next served to administer the ad interim government. [590] The first legal provision for the succession of the audiencia in Mexico, according to Bancroft, was contained in the royal instructions to Visitor Valderrama, who arrived in Mexico in 1563. These instructions, says Bancroft, provided that in the event of the death or inability of the viceroy to discharge his duties, the audiencia should rule temporarily. [591] This was indeed timely, in view of the death of Viceroy Velasco on July 31, 1564. The audiencia, which was legally authorized to take charge of the government, was under investigation when the death of the viceroy occurred, and the tribunal was dominated during the first half of its rule by the visitor, who, Bancroft tells us, was virtually viceroy. [592] Valderrama dismissed two of the oidores, and sent them to Spain. The audiencia was even less able to administer justice during the early part of its ad interim government than it had been when the viceroy was alive. After the departure of the visitor, however, the audiencia inaugurated a season of proscription and reprisal which bade fair to include every opponent of the oidores in the colony. Matters had reached a very unsatisfactory state, indeed, when the new viceroy, the Marqués de Falcés, arrived at Mexico on October 14, 1566. [593]