But while the population of the island enjoyed comparative security and prosperity, that of the coast towns was steadily worried by danger of invasion. When Governor Salamanca retired from office, the menace was still far from removed. After a provisional government of ten months, Don Rodrigo de Flores y Aldama, Field Marshal and Caballero de Alcantara, entered upon his administration on the fifteenth of June, 1663. With him arrived also a new bishop, Don Juan Saenz de Manosca, a Mexican of immaculate purity and uncompromising severity. He took charge of the diocese on the sixth of August and continued with greater success than Governor Salamanca in the moralization of the community. Realizing the increasing danger of invasion Governor Aldama at once set about to push the work on the walls of Havana. The garrison was increased by two hundred men. But Aldama was only a year later appointed Captain-General of Yucatan, and a new governor succeeded him, the Field Marshal Don Francisco Davila Crejon y Gaston, who had previously been governor of Gibraltar and Venezuela. He entered upon his office on the thirtieth of July, 1664, and immediately set to work with great energy and perseverance to hasten the construction of more fortifications. His predecessors had stored up an immense amount of building material and there was no reason why the work should not be carried on without delay. But Davila encountered serious difficulties and obstacles because his plans were opposed by the engineer Marcos Lucio and the viceroy la Espanola Marques de Muncere. The resources of the exchequer were at that time so scanty that Orejon ordered the provisory use of fagots in the construction of the fortifications of Havana. However, El Morro of Santiago de Cuba which had been blown up by filibusters a few years before, was rebuilt under his orders. The batteries of La Punta, la Estrella and Santa Clara were established. The governor of Santiago and D. Pedro Bayone finished these works and also walled up the convent of San Francisco making it equivalent to a fort. In the year 1665 the French pirate Pedro Legrand penetrated into Santo Espiritu with a force of filibusters. He set fire to thirty-three houses and demanded a ransom from every inhabitant. During that and the following year, the pirates plundered more than two hundred haciendas (farms) carrying off cattle and furniture. They committed unspeakable outrages, violating even the wives and daughters of the men whose homes they destroyed or robbed.