The Adversaria of Isaac Casaubon (largely the notes of that great scholar on Greek writers) were bequeathed by his son and arrived in 1673, together with the invaluable papers of Roger Dodsworth, whose name deserved to be on the title-page of “Dugdale’s” _Monasticon Anglicanum_. Dodsworth copied enormous masses of Yorkshire and North of England deeds and pedigrees just before the Civil War, in which very many of the originals perished. Fairfax had helped Dodsworth with an annuity, and bequeathed Dodsworth’s and some other valuable MSS. to the Library which he had guarded from harm in 1646. [Sidenote: The Third Catalogue.] The third Catalogue of the Library, which came out in 1674, was a folio of imposing dimensions, and though the MSS. are no longer included, was probably the largest which had till then appeared anywhere. It was of such general utility in the learned world that, for instance, Convocation deemed it worthy of presentation to Cosmo de Medici, and an interleaved copy of it was the only one used in the Mazarine Library at Paris till as late as 1761. It took nine years to prepare, and is attributed to Dr. Hyde, the Librarian. The period which ended with Hyde’s resignation in 1701 wound up with a large accession of Old and Middle English MSS. which came partly by the purchase of 112 Hatton MSS. in 1671 (including the copy of the English translation of Gregory’s _De cura pastorali_ made by Alfred, which the king presented to Worcester Cathedral, and also a translation of the same author’s _Dialogi_, with a preface by King Alfred), and partly by the extensive collections of Franciscus Junius (François Du Jon), a pioneer of Anglo-Saxon studies, which arrived (after purchase) in 1677. The chief treasures (the Cædmon and Ormulum) are described in Chapter V. The Oriental collections were also more than doubled by the purchase of the 420 Pococke MSS. in 1692 (chiefly Hebrew and Arabic), and of the six hundred Huntington MSS. (of the same general character) in the next year. And probably these judicious and valuable purchases led to the bequest by Archbishop Narcissus Marsh of about seven hundred additional Oriental MSS. in 1713. [Sidenote: Dissolution of Parliament.]