 Lewis met with Jones, Lewis Valentine, Moses Griffith, Fred Jones and D. Edmund Williams in a café called Maes Gwyn during the 1925 National Eisteddfod in Pwllheli, Gwynedd, with the aim of establishing a "Welsh party".They founded "" ("National Party of Wales"), on 5 August 1925.The principal aim of the party would be to foster a Welsh speaking Wales.