(‘Fire in Llŷn’). On 8 September 1936 Lewis, Saunders, D.J. Williams and Lewis Valentine – three members of Plaid Genedlaethol Cymru, started a fire at a government ‘bombing school’ at Penyberth on the Llŷn Peninsula. Following the failure of a Caernarfon jury to agree a verdict, the trial was reheard in London, where the three were convicted and sentenced to nine months’ imprisonment.