Papurau amrywiol, 2010-2011, yn ymwneud â'r digwyddiadau a drefnwyd i ddathlu daucanmlwyddiant y Cob, Porthmadog (1811-2011), 2011. = Various papers, 2010-2011, relating to the events held to celebrate the bicentenary of the Cob (1811-2011), Porthmadog.

A typescript dissertation on 'The History of Traeth Mawr and the Industrial Results of the Formation of the Embankment', by William Morgan Richards, Portmadoc, 1925.