Fifteen manuscript tune books belonging to Iolo Morganwg, including five volumes of hymn-tunes composed by him for his Welsh hymns or 'salmau', each entitled 'Salmyddiaeth Iolo Morganwg' or variants thereof (E2/1-5), together with several others containing at least some salmau (E2/8-12). Also included are volumes containing English hymns (E2/6, 11), Tribannau (E2/13) and Scottish airs (E2/15).