Llyfrau nodiadau Owen Owens, 1864-1925, yn cynnwys nodiadau pregethau a glywodd yn Nhrawsfynydd, Bala a Llangywer, sir Feirionnydd, ac mewn mannau eraill, 1864-1916, ynghyd â chofnodion Capel Moriah (MC) ac ysgolion ardal Trawsfynydd, yn enwedig Ysgoldy Caeadda,1896-1925, a dyddiadur, 1894. = Notebooks, 1864-1925, of Owen Owens, containing notes on sermons heard by him in Trawsfynydd, Bala and Llangywer, Merionethshire, and elsewhere, 1864-1916, together with records of Moriah Chapel (MC), and schools in the Trawsfynydd area, particularly Ysgoldy Caeadda, 1896-1925, and a diary, 1894.

A short novel based on traditions about Captain Morgan and Carreg-yr-ogof, Trawsfynydd, by 'Ioan Glan Prysor', circa 1865.

Letters and papers concerning the damage to properties which occured due to the activities of the Explosives Disposal Unit at Trawsfynydd, and the War Department Claims, 1954-1957.