night to ensure that the air conditioning was functioning properly. Scholderer, an expert on incunabula, produced A Handlist of Incunabula in the National Library of Wales in gratitude to the hospitality that was afforded to them by the Library. Likewise, Arthur E. Popham, Keeper of Prints and Drawings, dedicated The Drawings of Leonardo da Vinci ″To the Librarian and staff of the National Library of Wales″. Several other institutions donated funds to the Library as an expression of their gratitude and Mrs. David Sassoon, London presented two works by Cicero that were printed at Venice in the fifteenth century. The artefacts that spent World War II in the care of the National Library include the Magna Carta, drawings by Leonardo da Vinci, paintings by Rembrandt, Rubens and Velásquez from Dulwich College, letters of the kings and queens of England, and autographs belonging to William Shakespeare. Librarians John Ballinger (1909–1930) William Llewelyn Davies (1930–1952) Thomas Parry (1953–1958) E. D. Jones (1958–1969) David Jenkins (1969–1979) R. Geraint Gruffydd (1980–1985) Brynley F. Roberts (1985–1994) J. Lionel Madden (1994–1998) Andrew M. Green (1998–2013) Aled Gruffydd Jones (2013–2015) Linda Tomos (2015–2019) Pedr ap Llwyd (from 1 April 2019) Library collections The collections of the National Library of Wales include over 6.5 million printed volumes, including the first book printed in Welsh, Yny lhyvyr hwnn (1546). In addition to the printed book collections, there are about 25,000 manuscripts in the holdings. The archival collections at the Library include the Welsh Political Archive and National Screen and Sound Archive of Wales. The Library also keeps maps, photographs, paintings, topographical and landscape prints, periodicals and newspapers. In 2010, the Peniarth Manuscript collection and The Life Story of David Lloyd George were amongst the first ten inscriptions on the UK Memory of the World Register, a UNESCO record of documentary heritage of cultural significance. Collection development is focused on materials relating to the people of Wales, those in the Welsh language and resources for Celtic studies, but other materials are collected for the purposes of education and literary and scientific research. As a legal deposit library, the National Library is entitled to request a copy of every work published in the United Kingdom and Ireland. This has allowed the Library to collect modern Welsh, Irish and Gaelic language books for its Celtic collection. The acquisition of material through legal deposit has been supplemented by purchases, international exchanges, donations and