Having resolved to employ myself, during a prolonged residence in Portugal, in writing some work of fiction on that country, it struck me that the Times of the Marquis of Pombal would afford a good subject, untouched, as it is, by any other author. For a considerable time I delayed commencing my undertaking, almost in despair of finding the necessary materials. I wrote frequently to Lisbon to procure information, and mentioned my purpose to several Portuguese friends, who, at length, put at my disposal all the documents they possess relating to the private history of their families. From them I have composed the following work. I enjoyed, also, free access to the public Library at Oporto, a magnificent establishment, containing many thousand volumes, in all languages. Nor must I omit to mention the courteous attention I received from Senhor Gandra, the chief Librarian, in aiding me in my search for the works I required. Here I found several valuable volumes, in French and Italian, relating to the administration of the Marquis of Pombal, and the intrigues of the Jesuits; and some, in Portuguese, giving an account of the earthquake. The Library is established in a large building, formerly the Convent of S. Lazaro, the principal room vying in size and elegance with any of which the first cities in Europe can boast. There are, also, numerous other apartments, occupying the entire floor of the edifice, now crowded with books, which it will take many years to arrange.