The present city of Pensacola stands on a bay of the same name, which contains a safe and capacious harbor, where vessels drawing twenty-one feet of water can enter at low-tide, and find shelter and fine facilities for anchorage. It was formerly named Ochusa, from a tribe of Indians who lived here. Where the city is now built it is fine siliceous sand, supported by an understratum of clay, which is of varied colors. This clay is manufactured into brick, from which some of the houses are built, also pottery, and the monkey-jug, or water-cooler, so much used among the Spaniards in Cuba and Key West. The present plan of the city was laid out by the English in 1763, after they took possession of it. The streets cross each other at right angles, making squares of two hundred and fifty by four hundred feet, with a bay front of nearly a thousand feet. Many fine buildings were erected at that time--among which might be mentioned Casa Blanca, the residence of the Governor. The gardens attached to the city lots, the strong fortifications, and the edifices of different designs which graced the streets and squares, were the pride of Florida. The Governor rode in his chariot, making pleasure-trips to his landed estates, six miles from town, escorted by his postilions, and surrounded by his companions in authority, thus deporting himself like a genuine scion of royalty. During these days of prosperity Pensacola was attacked and conquered by the Spaniards under Count Galvez, in 1781. The place was defended by General Campbell; but the magazine at Fort St. Michael being blown up, resistance was useless, and the town surrendered. This event marked the commencement of its decline; the work of twenty years was blighted, and the prosperity of the city waned. When Florida was ceded by Spain to the United States, St. Augustine in East Florida, and Pensacola in West Florida, were the only towns of any importance in the State. The country about the city was poor, the good lands of the interior being occupied by the Indians; besides, the original settlers were not as enterprising a class of people as those in East Florida. The above considerations, together with disease, fierce contests with foes of other nations, its inaccessibility, and no large water-course connecting it with the interior fertile cotton-lands, are the combined reasons why Pensacola is not equal in size to any town on the Gulf.