In the later years of his life Franklin gave no little attention to fine printing, though as a dilettante rather than as a commercial printer. In France he was friendly with François Ambroise Didot, the greatest French printer of his times, and put his grandson Benjamin Franklin Bache to school in Didot's establishment. With Pierre Simon Fournier, who ranked next to Didot among French printers, Franklin corresponded from time to time. In England the American printer maintained touch with prominent practitioners of his craft from the time of his first visit abroad until his death. Samuel Palmer, Franklin's first London employer, was but a mediocre printer; but John Watts, to whose house the young American went after a year at Palmer's, stood much higher in his vocation.[i-167] Both Watts and Palmer were patrons of William Caslon, from whom Franklin later bought type. But John Baskerville, Caslon's rival, was the founder whom Franklin did most to encourage and to bring to the attention of discriminating printers. The English printer with whom Franklin was upon the terms of greatest intimacy--and that for many years--was William Strahan, member of Parliament, King's Printer, and a successful publisher. Strahan was a man of parts, a great letter writer, and a friend of David Hume and Samuel Johnson. The latter referred to the Strahan shop as "the greatest printing house in London."[i-168] Another correspondent was John Walter, logotyper, press builder, and founder of the London _Times_.[i-169] In all his letters to his printer friends, Franklin shows not only a lively interest in improvements and inventions for the trade, but also an increasing interest in the artistic side of printing and type-founding. The "bookish inclination" which Franklin credits in the _Autobiography_ with being the quality that decided his father to make a printer of him, appertained to the trade because printers were commonly publishers and sellers of books and pamphlets, and often editors and publishers of newspapers. How the young Franklin satisfied his literary urge in the print shop of his brother James is a familiar story, and his theories of writing are traced in another section of this Introduction. The contribution to literature which he made as a publisher of original books is negligible, but he did his part both as publisher and bookseller to spread that bookishness to which he felt that he owed much of his own success. Like all publishers before and since, he was forced by his customers to issue books of a lower sort than he could fully approve in order to float editions of more desirable works: he tells plaintively of his public's preference for "Robin Hood's Songs" over the Psalms of his beloved Watts.[i-170] In still another way, Franklin promoted the bookishness of his community: he founded the first of American circulating libraries, and he built up for himself one of the largest private libraries in the country.[i-171]