After Kynance Cove, other quarry sites gradually came into use as more of the mineral was discovered and the demand increased. Other supporting evidence of its first use from that site is to be found on what is recognised as the first very accurately surveyed Map of Cornwall made by Cornishman Thomas Martyn. On the Martyn Map,(which took him 10–15 years to Survey), Kynance Cove is not identified by the name Kynance but merely by the words "The Soapey Rock" indicating that the Soaprock may have been removed from there by early porcelain potters prior to the currently accepted first use date of 1748.