Cyfansoddiadau amrywiol a gyflwynwyd i gystadlaethau llenyddol a cherddorol Eisteddfod Genedlaethol Cymru, 1887-2019. Yn eu plith ceir awdlau, pryddestau, cywyddau, englynion, englynion ysgafn, baledi, sonedau, straeon byrion, blogiau, llên meicro a dramâu. Ceir gweithiau ar gyfer y Fedal Ryddiaith, Gwobr Daniel Owen, Ysgoloriaethau Emyr Feddyg a Geraint Morris, ynghyd ag emyn-donau a chyfansoddiadau Tlws y Cerddor a chyfansoddi dawns. Cyflwynwyd cystadlaethau i ieuenctid a chystadleuaeth y gadair a thlws rhyddiaith i ddysgwyr ac i'r rhai sydd wedi byw yn y Wladfa ar hyd eu hoes. = A variety of literary and musical compositions entered at National Eisteddfodau, 1887-2018, including odes and poetry in free metre, ballads, short stories, blogs, micro literature and plays. Entries for the Prose Medal, Daniel Owen Memorial Prize, Emyr Feddyg and Geraint Morris Scholarships, together with musical compositions such as the Musicians' Medal, hymn-tunes and dance composition are also included. Competitions for young people, Welsh learners including a chair and prose competition and a competition for those who have lived in Patagonia throughout their lives have been introduced.

Letters addressed to David Lewis, mainly on matters relating to Welsh music, 'eisteddfodau' and the bibliography and biography of music. The correspondents are W[illiam] T[homas] Samuel, Swansea, 1890, T. Simpson, Burnley, Charles Edwin Smith, London, 1908, 'Tafalaw' [Thomas Gruffydd Jones], 1863-1865, John Thomas, Blaenannerch and Llanwrtyd, 1864-1874, William Thomas, Treorci, 1899, B[enjamin] M[orris] Williams, Ruthin, 1864-1865, D. Williams, Llangollen, 1903, E. N. Williams, Corwen, 1866, E[llis] Ylltyr Williams, Dolgellau, 1881, G. M. Williams, Luzerne, Pennsylvania, John Cledan Williams, New Tredegar, 1900, R. Williams, Garndolbenmaen, 1869, T[homas] Williams, Llanidloes ['Hafrenydd'], 1869, W. G. Williams, Corwen, 1878-1886, and Williams Williams, Llandudno, 1862.