You are aware that I have, at intervals, employed myself a good deal in the manuscript room of the British Museum, during the last four years, in researches among the Illuminated MSS. of the fifteenth century, on the subject of Costume; for the purpose of helping me to form a right judgment of the ages and country of certain books of wood-engravings, which are known by bibliographers under the name of Block-Books; and are commonly supposed to have given rise to the invention of Typography: for the controversy concerning this subject has long occupied my attention; and, although so many books have been written upon it during the last two centuries, I have become more and more persuaded, that the evidence on both sides must be subjected to a nicer examination, and sifting, than it has yet had, before we can hope to come to a right decision concerning it.