The recent erection of Cadiz into a free port, has not brought with it all the advantages that were anticipated; but it has, nevertheless, had an important influence upon its prosperity. Immediately upon Cadiz being created a free port, immense shipments of manufactured goods were made from England; and several branches of Manchester houses were established there. So improvident had been the export from England, that last autumn, calicos and muslins were bought in Cadiz 20 per cent. cheaper than in England. But the chief increase in the commerce of Cadiz, arises from the facilities now afforded for illicit trade with the rest of Spain. This is principally seen in the import of tobacco, which comes free from the Havannah, and which is not intended so much for the consumption of the city, as for supplying the contraband trade with the ports and coast of Spain. There are said to be six thousand persons in Cadiz employed in twisting cigars. But it is not in tobacco only that Cadiz has drawn to itself the illicit trade of the Mediterranean. There is also an extensive contraband trade in English manufactured goods, which can be bought throughout Spain, at only thirty per cent. above the price at which they cost in Cadiz. Gibraltar formerly monopolized the contraband trade of the Spanish coast; and the effects resulting from Cadiz having been made a free port, have proved most ruinous to the interests of Gibraltar; the merchants of the latter place have endeavoured to support themselves by establishing branch houses in Cadiz, and of these there are no fewer than twenty-five. The change in the commercial prosperity of Cadiz has materially affected its population,--in 1827, the inhabitants scarcely reached fifty-two thousand; in 1830, they exceeded sixty-seven thousand.