Preparatory notes for lectures and addresses on congregational singing, including material relating specifically to the Gymanfa Ganu and to the conducting of congregational singing. A few notes relating to conducting in general are also included.

Dogfen yn cynnwys nodiadau John Hughes, y cerddor, yn dwyn y teitl 'Yr Emyn', a ysgrifennwyd ar gyfer rhaglen deledu i drafod yr emyn, tua chanol y 1960au.

A typescript copy of a lecture entitled 'Congregational singing in Nonconformist Wales', delivered by J. Lloyd Williams at Harlech in August 1941; an exercise book containing an address/lecture entitled 'Caniadaeth y Cysegr'; manuscript notes of a lecture on the same topic delivered at Trawsfynydd in 1929, Treherbert, 1940 and Ystradgynlais, 1941; notes of lectures relating to hymn tunes given in 1938 and 1942; and preparatory notes for the president's address at a singing festival in Aberystwyth, April 1917.

A number of hymn tunes, psalms and related notes and press cuttings, [1840], [1906x1930], mostly in J. Lloyd Williams's hand but also including notes by Mary Davies and a few related letters, 1918-1929, from others. Notes of a lecture entitled 'Caniadaeth y Cysegr', delivered at Aberystwyth in 1926, are also included, together with a reference to a folk song in the Ifor Ceri MSS.

Incomplete outlines of four series of lectures delivered by J. Lloyd Williams to classes at Aberystwyth, 1929, Bala, 1928-1929, Blaenau Ffestiniog, 1927-1928, and Trawsfynydd, 1928-1929. The topics include the history of Welsh music, congregational singing and folk singing. Two short essays by a member of the Trawsfynydd class, 1927, relating to the gypsies of Llangwm, are also included.