We can not be certain what the plans of Cortes were, nor can we tell just how much he did to carry his schemes into execution, during the years from 1537 to 1540. Shortly after the men whom Cortes had established at Santa Cruz were recalled, a decree was issued, in the name of the audiencia, to forbid the sending of any expedition for exploration or conquest from New Spain. Cortes declared that he had at this time, September, 1538, nine good ships already built. He was naturally unwilling to give up all hope of deriving any benefit from his previous undertakings, as would be inevitable if Mendoza should succeed in his projects for taking advantage of whatever good things could be found toward the north. The danger must have seemed clear so soon as he learned of the departure of Friar Marcos and the negro on their journey toward the Seven Cities. There is no means of knowing whether Cortes had learned of the actual discovery of Cibola, when he suddenly ordered Francisco de Ulloa to take three vessels and sail up the coast toward the head of the Gulf of California. The friar may have sent Indian messengers to the viceroy so soon as he heard the native reports about the seven cities of Cibola, and it is possible that the news of his approaching return may have reached New Spain before the departure of Ulloa, which took place July 8, 1539, from Acapulco.[40] It seems clear that this action was unexpected, and that it was a successful anticipation of preventive measures. In the statement of his grievances, Cortes declares that Mendoza not only threw every possible obstacle in his way, seizing six or seven vessels which failed to get away with Ulloa, but that even after Ulloa had gone, the viceroy sent a strong force up the coast to prevent the ships from entering any of the ports. When stress of weather forced one of the ships to put into Guatulco, the pilot and sailors were imprisoned and the viceroy persistently refused to return the ship to its owner. About the same time, a messenger who had been sent to Cortes from Santiago in Colima was seized and tortured, in the hope of procuring from him information about the plans of Cortes.[41] After Friar Marcos came back from the north and filled the people in New Spain with the desire of going to this new country, Cortes realized that he could do nothing, even in the city which he had won for his King and for Europe, to prevent the expedition which Mendoza was already organizing. Early in 1540—we know only that he was on his way when he wrote to Oviedo from Habana[42] on February 5—the conqueror of Motecuhzoma’s empire left Mexico for the last time, and went to see what he could gain by a personal application at the court of His Majesty the Emperor, Charles V. [p370]