I soon realised that what had happened on a small scale cannot necessarily be repeated on a larger scale. The stones were so big that the amount of heat required was prohibitively expensive and wasteful.

(1996).  
Goldsworthy Andy; Jerry L. London: Viking.

Andy Goldsworthy OBE (born 26 July 1956) is a British sculptor photographer and environmentalist producing site-specific sculpture and land art situated in natural and urban settings.