Besides being a bookseller, Dorne was also a publisher on a small scale. An edition of the _Opus Insolubilium_, a book used in the schools at Oxford, and printed by Peter Treveris at Southwark for I. T., has been known for some time from a copy in the library of Corpus Christi College, Oxford. The I. T. was considered to stand for John Thorne, the English form of Dorne. This has been confirmed by a recent discovery. From the sale in 1906 of the library of the Duke of Sutherland at Trentham Hall, a most interesting volume was secured for the University Library. It contained three tracts connected with Oxford. The first was the _Libellus Sophistarum_ printed at London by Wynkyn de Worde, of which there were several editions. The second was another copy of the _Opus Insolubilium_ mentioned above; but the third was an entirely unknown book, an edition of the _Tractatus secundarum intentionum logicalium_. This has a clear imprint starting that the book was to be sold by John Thorne in the year 1527. At the end of the last two pieces is the device of the printer, Peter Treveris. We find frequent entries of these two books in Dorne’s ledger of 1520, so that evidently, finding the sale so good, he determined to have editions printed for himself. It is only from this recent discovery that we are able to attach the date of 1527 to these books printed at Oxford, but this fits in most curiously with an assertion made by the Oxford antiquary, Anthony a Wood. Herbert, in his account of Treveris, wrote: “Mr Wood thought he had printed a Latin grammar of Whitinton’s at Oxford in 1527 as also books about and before that time, but we have not met with any such.” Wood does not speak of any other books except the edition of Whitinton’s grammar, and from his giving the exact date we must either conclude that he was referring to a genuine book which he had seen, or else had seen a copy of this book printed for Dorne and had confused it with some other tract. Wood is also responsible for the assertion that Wynkyn de Worde printed for a while in Oxford, and asserts that a lane called Grope Lane had its name altered to Wynkyn Lane as a memorial of his work there. For this statement there seems no foundation, but it is quite probable that W. de Worde had more considerable dealings with the Oxford stationers than we know at present. He printed a book for Jacobi, to which I have already referred, and when the press was restarted at Oxford in 1517 he supplied some of the material. So much new information has come to light recently about the Oxford book-trade, that we may fairly hope for more, and perhaps discover further dealings there of De Worde.