He was prominent in the activities of the National Eisteddfod for many years. He won the crown in 1910 on the subject ‘ Ednyfed Fychan ’ and in 1919 on ‘ Morgan Llwyd o Wynedd ’. But the pryddest ‘ Gwerin Cymru ’, which won him the crown in 1911 , is his best-known work. He was elected archdruid in 1938 and held the office until 1947 . The University of Wales conferred on him an hon. M.A. degree and he was honoured by Swansea Borough Council in 1968 when his bust was placed in the Town Library . He was one of the most prolific and popular poets of his time. He published four volumes of poetry: Cerddi Crwys ( 1920 ; 5 eds.), Cerddi Newydd Crwys ( 1924 ; 3 eds.), Trydydd Cerddi Crwys ( 1935 ), Cerddi Crwys, y pedwerydd llyfr ( 1944 ), and two selections of his poems ( 1953 and 1956 ). His recitation pieces for children and adults were very popular at eisteddfodau in the second quarter of the twentieth century, but he is chiefly remembered as the author of well-known lyric poems such as ‘ Dysgub y Dail ’, ‘ Melin Trefin , ‘ Siôn a Siân ’, ‘ Y Border Bach ’, and ‘ Y Sipsi ’. He is one of the poets who succeeded in freeing himself from the fetters of the ‘New Bard’. He also published A brief history of Rehoboth Congregational Church, Bryn-mawr, from 1643 to 1927 ( 1927 ), and two volumes of reminiscences, Mynd a dod ( 1941 ) and Pedair Pennod ( 1950 ). Among his surviving MSS. is the material for an English volume, ‘ Hither and thither ’, which corresponds, more or less, to Mynd a dod .