Limestone was a vital material brought to Talybont on the Brinore Tram Road from Trevil 8 miles to the south for transporting on the canal. Before it could be used for agriculture, mortar or coatings for buildings it had to be burnt in layers with coal to reduce into a fine usable powder. The immediate product was very caustic quicklime that had to be transported in barrels. Records were kept in the adjacent Counting House which still exists as a dwelling.