REVD. AND DEAR SIR,--I arrived safely at Cadiz on the 21st ult.; the steam-engine had been partially repaired at Lisbon, and our passage was speedy and prosperous. I was happy to have reached the shores of Spain, being eager to enter upon my allotted task. Cadiz is a small but beautiful city, built upon a tongue of land and surrounded on all points but one by the sea, which dashes up against its walls: the houses are lofty, and of a dazzling whiteness; the streets are straight and narrow. On my arrival I found great confusion reigning: numerous bands of the factious were reported to be hovering in the neighbourhood, an attack was not deemed improbable, and the place had just been declared in a state of siege. I took up my abode at the French Hotel, in the Calle de la Niveria, and was allotted a species of cock-loft or garret to sleep in, for the house was filled with guests, being a place of much resort on account of the excellent _table d'hote_ which is kept there. I dressed myself and walked about the town. I entered several coffee houses: the din of tongues in all was deafening; in one no less than six orators were haranguing at the same time on the state of the country, and the probability of an intervention on the part of England and France. As I was listening to one of them he suddenly called upon me for my opinion, as I was a foreigner, and seemingly just arrived. I replied that I could not venture to guess what steps the two Governments would pursue under the present circumstances, but thought that it would be as well if the Spaniards would exert themselves more, and call less on Jupiter. As I did not wish to engage in any political conversation I instantly quitted the house, and sought those parts of the town where the lower classes principally reside. I entered into discourse with several individuals, but found them very ignorant; none could write or read, and their ideas respecting religion were anything but satisfactory, most professing a perfect indifference. I afterwards went into a bookseller's shop, and made enquiries respecting the demand for literature, which he informed me was small. I produced our 24mo edition of the New Testament in Spanish, and asked the bookseller whether he thought a book of that description would sell in Cadiz. He said it was exceedingly beautiful, both in type and paper, but it was a work not sought after, and very little known. I did not pursue my enquiries in other shops, for I reflected that I was not very likely to receive a very favourable opinion from booksellers respecting a publication in which they had no interest. I had, moreover, but two or three copies of the New Testament with me, and could not have supplied them had they given me an order.