Notes on quarry produce and business, 1774-1789, including observations on heating, sizing and cutting stones and on polishing marble at the water mills at Cefn Cribwr; notes concerning the various uses of flagstone and tile stone in roofs, windows and flooring; and notes on exporting excess flagstone and tile stone to South West England, including Somerset, Devon and Cornwall. The file also includes unrelated notes on dry stone walling in Oxfordshire.