Before we set foot on this imperceptible trophy of a league in length by two thousand feet high the French ensign and myself hailed a steamer as we passed by her in the offing, and found she was bound for Cadiz, and we must go on board the following afternoon. On landing, however, my projects underwent a change, as I told you at the commencement of my letter. There is not much to be seen at Gibraltar that would interest you, except indeed the unique aspect and situation of the place. To military men its details offer much interest. There is a large public garden on the side of the mountain, between the town, which occupies the inmost extremity, and the Governor's house near the entrance of the bay. The batteries constructed in the rock are extremely curious, and calculated to embarrass an enemy whose object should be to dismount them. I thought, however, with deference to those conversant with these subjects, that they were likely to possess an inconvenience--that of exposing to suffocation the gunners employed in the caverns, out of which there does not appear to exist sufficient means of escape for the smoke. The most amusing sight in Gibraltar is the principal street, filled, as it is, with an infinitely varied population. Here you see, crowded together as in a fair, and distinguished by their various costumes,--the representatives of Europe, Asia, and Africa,--Arabs, Moors, Italians, Turks, Greeks, Russians, English, and Spaniards, Jews, and, occasionally, a holy friar conversing with some Don Basilio, appearing, in his long cylindrical hat, as if blessed with a skull sufficiently hard to have entered the side of a tin chimney-top, precipitated upon it by a gust of wind. Among all these a successful guess may here and there be risked at the identity of the Andalucian leader of banditti, lounging about in search of useful information. The contrabandistas are likewise in great plenty. LETTER XVII. CADIZ. ARRIVAL AT SEVILLE. Seville.