There is still much to be done in the investigation of the history and relationships of Greek MSS. In spite of the numberless editions of the great authors, and the labour that has been lavished upon them, I believe that scholars would agree that in very few cases, if any, is the transmission of the text at all perfectly known. For some writings we have too little MS. evidence, for some so much as to be embarrassing. In no case can we afford to neglect and to leave unrecorded anything that a MS. can tell us as to its place of origin, its scribe, or its owners. Names and scribblings on fly-leaves, which to one student suggest nothing, may combine in the memory of another into a coherent piece of history, and show him the home of the book at a particular date, and by consequence unveil a whole section of the story of its wanderings. With one little instance of this kind I will bring to an end my remarks on this first and shorter portion of my subject. In the library of Corpus Christi College at Cambridge is a Greek Psalter written in the middle of the twelfth century. On one of its last pages is scribbled in Greek letters by a later hand the name of John Farley ("[Greek: Hiôhannês pharlehi]"). Only about five-and-twenty volumes away from this stands a MS. containing letters written by the University of Oxford on public occasions. One of these is signed by J. Farley. A little enquiry elicits the fact that John Farley was official scribe of that University near the end of the fifteenth century. The Greek Psalter, then, was pretty certainly at Oxford in Farley's time. What do we know of Greek MSS. then at Oxford? We know that Bishop Robert Grosseteste of Lincoln owned such things, and that he bequeathed his books to the Franciscans of Oxford at his death in 1254; and when we examine the Psalter again, we find that it is full of notes in a hand which occurs in other Greek MSS. known to have belonged to Grosseteste, and which I take to be Grosseteste's autograph. So the mere occurrence of John Farley's name helps us to write the history of the book from within a hundred years of its making until the present day. Procured by Grosseteste some time before 1254, it passes to Oxford, and remains there till the Grey Friar's Convent is dissolved by Henry VIII. Then there is a gap of a generation at most. Matthew Parker, Archbishop of Canterbury, acquires it (believing it, absurdly enough, to have belonged to Archbishop Theodore in the seventh century), and bequeaths it to his college of Corpus Christi in 1574. LATIN MSS. We turn to the Latin division, and here the difficulty of selecting lines of procedure is very great. A paragraph of historical preface, at any rate, must be attempted.