Carnarvon Traders - this most useful site by Keith Morris contains complete transcriptions of the Caernarfon sections of over 20 Trade Directories dating from 1791 to 1948; full transcriptions of the 1794 Caernarfon Town Census and the 1841 Borough Election Canvass Book; and other miscellaneous items including a biographies section.
Jones, G. O., papurau (papers) 1842-1982 - details of extant records on Archives Network Wales
"G. O. Jones of Ael-y-Garth, Caernarfon was the headmaster of Caernarfon Free School and of Maesincla Junior School, Caernarfon. He also researched the history of Caernarfon and churches in the parish of Llanbeblig, most notably St Mary's Church and Christ Church. He wrote pamphlets on their histories..........."