the siege. Second period of construction Beginning in 1738, under the supervision of Spanish engineer Pedro Ruiz de Olano, the interior of the fort was redesigned and rebuilt. Interior rooms were made deeper, and vaulted ceilings replaced the original wooden ones. The vaulted ceilings allowed for better protection from bombardments and allowed for cannon to be placed along the gun deck, not just at the corner bastions. The new ceilings required the height of the exterior wall to be increased from 26 to . Second British siege Spain and Britain were rivals in Europe, and since the two countries had both founded empires in the New World, their rivalry continued there as well. In 1733 a British vessel, the Rebecca, commanded by Captain Robert Jenkins, was seized in the Caribbean by the Spanish coast guard. Suspecting that the British had been trading illegally with Spanish colonies (which was forbidden by both Spain and Britain), the Spanish searched the ship. A fight broke out between the Spanish and British sailors. In the skirmish, Jenkins had his ear cut off by a Spanish officer, who picked it up and said "Take this to your king and tell him that if he were here I would serve him in the same manner!" When Jenkins reported the incident to British authorities, they used it as a pretext to declare war on Spain in 1739. The war was called the War of Jenkins' Ear. After British Admiral Edward Vernon won a huge victory at Portobelo, General James Oglethorpe, the founder of Georgia, was quick to imitate him in North America. In June 1740, Oglethorpe and a British fleet of seven ships appeared off St. Augustine. As in the 1702 siege, three hundred soldiers and 1,300 residents found refuge within the Castillo's walls. For 27 days the British bombarded the Castillo and St. Augustine. Realizing his cannon were not affecting the Castillo's walls of coquina, Oglethorpe decided to starve the people of St. Augustine by blockading the inlet at the Matanzas River and all roads into St. Augustine. However, some supplies were able to reach the city via the river, and with morale and supplies low for the British forces, Oglethorpe had to retreat. In order to protect the city from future blockades and sieges, the Spanish built Fort Matanzas to guard the river, which could be used as a rear entrance to avoid St. Augustine's