Doble also collected Cornish folklore and folksong. In 1928 he was made a Bard of the Cornish Gorseth, taking the Bardic name "Gwas Gwendron" ('Servant of Gwendron') and received the Jenner medal of the Royal Institution of Cornwall. He was responsible for the first performance of the Cornish miracle play "Beunans Meriasek" since the Reformation in June 1924 (in English translation). There have since been many acclaimed productions, including those in the original Cornish language. Doble's research also led to the revival of the Hal-an-Tow event at the annual Helston Flora Day.