Penygraig Papers  - details of extant records on Archives Network Wales
"Papers relating to Penygraig, Bodferin, 1826-1921, including letters to John Williams and family, 1828-1873, especially from Thomas W. Jones in New York state; records relating to the Churchwardens and Overseers of the Poor, Bodferin, 1841-1849, including orders for payments to the Treasurer of the Pwllheli Poor Law Union; records of Cymdeithasfa y Trefnyddion Calfinaidd (Association of Calvinistic Methodists), 1845-1886; diaries of John Williams, 1838-1866; and sale catalogues, 1912-1921"

Details of extant records on Archives Network Wales for the following;

• Caernarfonshire County Architect's Plans : 1860-1973
• Caernarfonshire / Gwynedd County Councils Social Services Department Records 1918-1983
• Caernarfonshire County Council Archives, Papers of the Air Raid Precautions and Civil Defence Departments 1935-1970
• Caernarfonshire County Council archive, Clerk's Department records 1833-1983
• Caernarvonshire County Council, Land Agent's Records and Caernarfonshire Rivers Catchment Board Records 1898-1979
• Caernarvonshire War Agricultural Committee Maps 1900-[ c.1944] (accumulated 1917-1944)
• Caernarfonshire Land Tax assessment records 1746-1956
• Caernarfonshire Official Maps and Plans 1774-1949
• Caernarfonshire Quarter Sessions Records 1541-1901   "The Court of Quarter Sessions in Caernarfonshire sat four times a year, attended by the Justices of the Peace of the county. Quarter sessions courts began in Wales after the Acts of Union, 1536-1543.
• Caernarvonshire Quarter Sessions County Gaol Records    "Caernarfonshire Court of Quarter Sessions was responsible for maintaining the County Gaol, re-built in the 1780s............"
• Caernarfonshire Quarter Sessions Licensing Records 1626-1945
• Caernarfonshire Quarter Sessions, Gamekeepers' Deputations 1812-1888
• Caernarfonshire County Council, Caernarfonshire War Agricultural Executive Committee papers 1917-1922
• Caernarvonshire and Anglesey Infirmary, records 1811-1969    "The Loyal Dispensary, Bangor was opened in 1810, primarily to provide vaccines for smallpox. In 1845, the institution moved premises to Upper Bangor, and was re-named the Caernarvonshire and Anglesey Infirmary (C. & A. Infirmary)......"
• Caernarvonshire Constabulary records 1857-1969  "The Caernarvonshire Constabulary was formed in 1857....."
• Caernarvonshire Motor taxation records 1904-1977  "Under the Motor Car Act 1903, all motor vehicles and motor cycles had to be licensed by their local county for use on public roads, and were assigned a unique registration number. Drivers of motor vehicles were also licensed by their local authority....."
• Records of the National Farmers' Union in Caernarfonshire 1937-1978  "The National Farmers' Union was formed in 1908 and represents farmers and growers in England and Wales........."