useful municipal works, such as aqueducts and sewers, engaged the notice of the viceroy until, in 1607; and after the proclamation of the Prince of Asturias (Philip IV.) by order of the king, he was ordered to pass from Mexico to Peru where he was charged with the duties of the viceroyalty. CHAPTER VI. 1607-1621. SECOND ADMINISTRATION OF DON LUIS VELASCO--HIS GREAT WORK FOR THE DRAINAGE OF THE VALLEY.--LAKES IN THE VALLEY--DANGER OF INUNDATION.--HISTORY OF THE DESAGUE OF HUEHUETOCA.--OPERATIONS OF THE ENGINEERS MARTINEZ AND BOOT.--THE FRANCISCANS.--COMPLETION OF THE DESAGUE.--LA OBRA DEL CONSULADO.--NEGRO REVOLT.--EXTENSION OF ORIENTAL TRADE.--GUERRA VICEROY.--DE CORDOVA VICEROY.--INDIAN REVOLT.--CORDOVA FOUNDED. DON LUIS VELASCO,--THE SECOND,--CONDE DE SANTIAGO AND FIRST MARQUES DE SALINAS, XI. VICEROY OF MEXICO. HIS SECOND ADMINISTRATION. 1607-1611. Don Luis Velasco had been seven years viceroy of Peru since he left the government of Mexico, when he was summoned once more to rule a country of which he felt himself almost a native.[35] He was tired of public life, and being advanced in years would gladly have devoted the rest of his existence to the care of his family and the management of his valuable estates in the colony. But he could not refuse the nomination of the king, and at the age of seventy, once more found himself at the head of affairs in New Spain. The government of this excellent nobleman has been signalized in history by the erection of the magnificent public work, designed for the drainage of the valley, of which we spoke during the last viceroyalty. The results of Velasco's labors were permanent, and as his work, or at least a large portion of it remains to the present day, and serves to secure the capital from the floods with which it is constantly menaced, we shall describe the whole of this magnificent enterprise at present, though our description will carry us, chronologically, out of the period under consideration, and lead us from the seventeenth to the nineteenth century.