'An Account of the Lead & Silver Mines in the King's Mannor Called Cwmmwd y Perveth in the County of Cardigan in South Wales, with proper Maps and Draughts of the Several Works, and the Quality of the Ore, and their situations ... Taken by Order of Thomas Walker Esqr. Surv. Genl. of his Majesty's and Revenues. Datd. 2d. Augt. 1744. By Lewis Morris'.