In 1766 the churchwardens of the parish of St Beuno, Trefdraeth on Anglesey, supported by the Cymmrodorion, began a test case against an English clergyman, Dr Thomas Bowles, who could not conduct services in Welsh and whose attempt to do so had ended in ridicule. In its verdict in 1773 the Court of Arches refused to deprive Dr Bowles of his living, but did lay down the principle that clergy should be examined and found proficient in Welsh in order to be considered for Welsh-speaking parishes.