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.