bequests. The Celtic collection includes works in all six Celtic languages. A representative collection of Scottish Gaelic books has been assembled, primarily through purchase of earlier publications, guided by the standard bibliographies, and, for books published after 1911, by legal deposit. Irish literature, which is far more extensive, has been collected through a similar combination of purchase and deposit. However, many collections purchased by or donated to the Library have contained rare Irish books. The Library of Dr E. C. Quiggin, which was received in 1921, contained a large Irish collection and many early Breton books. Further Breton books have been purchased or were acquired in the libraries of Sir Edward Anwyl, Thomas Powel, Dr Thomas Gwynn Jones, Dr Paul Diverres and Llywarch Reynolds. The holdings of Cornish and Manx printed books include practically everything that has been published in those languages, with a few facsimiles. The online catalogue of the National Library is available to search remotely or onsite . The Library's holdings can also be found in the European Library and Copac union catalogues. Manuscripts The National Library of Wales keeps many rare and important manuscripts, including the Black Book of Carmarthen (the earliest surviving manuscript entirely in Welsh), the Book of Taliesin, the Hendregadredd Manuscript, and an early manuscript of Geoffrey Chaucer. Around three hundred medieval manuscripts are deposited in the Library: about 100 are in Welsh. The manuscript collection amalgamated a number of entire collections that were acquired in the early years of the Library's existence, including the Hengwrt-Peniarth, Mostyn, Llanstephan, Panton, Cwrtmawr, Wrexham and Aberdare manuscripts. The Welsh manuscripts in these foundation collections were catalogued by Dr J. Gwenogvryn Evans in the Reports on manuscripts in the Welsh language that he compiled for the Historic Manuscripts Commission. Peniarth Manuscripts The Peniarth Manuscripts collection is considered to be of global significance and the most important collection of manuscripts in the National Library of Wales. In 2010, it was included in the UK Memory of the World Register of documentary heritage. Of the 561 volumes of manuscripts in the Peniarth collection, some four-fifths were collected by Robert Vaughan (c. 1592–1667) for his library in Hengwrt, Meirioneth. Three of the Four Ancient Books of Wales are part of the Peniarth collection, and this is indicative of the overall quality of the manuscripts and their importance as part of Welsh heritage. There are, however, also manuscripts in Cornish, Latin