In 1957, still unable to travel, he sang down the telephone line to a packed house of 5,000 people in the Porthcawl Pavilion for the Miners’ Eisteddfod.
Ym 1957, ac yntau'n dal i fethu â theithio, canodd dros y ffôn i bafiliwn gorlawn o 5,000 o bobl ym Mhorthcawl ar gyfer Eisteddfod y Glowyr.