A trial trip was made to the islands of pearls, on one of which, called _Isla Rica_, or the Rich Island, he established a base of supplies, and then, with one hundred men aboard his clumsy brigantines, he set sail for the coast of the mainland, where it stretched away to the west and the southward. He was then, if he had but known it, on the watery highway to Peru, but which another was to traverse, to its ending at the gateway of the golden empire. He had found the way, however, and was content, for, with four brigantines soon to be under his orders, and three hundred men in his command, it seemed to him that the treasures of Peru now lay open before him. He could exploit them at his leisure, he thought, and when a school of whales appeared ahead of his vessel--which he mistook for reefs--and a contrary wind assailed him, he abandoned his cruise to the southward and returned to Isla Rica. Balboa was a careful commander, and he had been three years dreaming of and preparing for the invasion of Peru. He would not, then, jeopardize his chances by starting out half equipped, with less than one-third the number of men he desired and in all probability needed. So he returned to Isla Rica, which, having reduced its people to subjection and investigated its resources, he planned to make his headquarters. With what exultation he found himself at last free from the domination of Pedrarias! With what delight he rambled over his island realm and thought upon the freedom that would be his, the glorious opportunities unfolded, the treasure he would obtain, when, at last afloat, with armament complete, he would bear down for the land that then lay dim and shadowy upon the horizon! But, even while indulging in these dreams of future conquest, sinister rumors reached him from the northern shores of the isthmus. At least, viewed in the light that Pedrarias was now his friend, they seemed so, for they related to the arrival of a new governor, who might not look with favor on his schemes, and indeed supplant him with favorites of his own. After consulting with the most trusty of his officers, he resolved to send a messenger to Acla, in order to ascertain the exact condition of affairs in Antigua, for reports were conflicting, and he knew not what to do. The man selected for this important mission was none other than Andres Garabito, who had brought the contingent of armed men from Cuba. Balboa thought he could trust him, as they had campaigned together, passed through perils together, and existed in close comradeship for years; but he had not taken into the account a recent occurrence which had changed Garabito's friendship into bitter hatred.