A notebook containing 'Plans of British Camps, Tomens, Cromlechs & Meini Hirion in the district of Lleyn and Eifionedd, from Beddgelert on the East to Aberdaron on the West, in the county of Caernarvon by J. G .Williams, Penllyn, Nr Pwllheli', 1872. The volume contains plans of hill forts with explanatory notes, descriptions of cromlechs and descriptions and sketches of meini hirion. Inserted at the beginning is a 'Map [with key] showing the positions of the British Camp [sic] etc. In the District of Lleyn Caernarvonshire'. J. H. Davies has given cross-references to BM Add MS 28860 (which is in the same hand but is dated 1871) and Archaeologia Cambrensis, 1903, p. 251.