Gage, Mary E. and J. E. Gage. The Art of Splitting Stone: Early Rock Quarrying Methods in Pre-Industrial New England, 1630-1825. Amesbury, MA: Powwow River Books, 2005.

Gage, Mary E. and J. E. Gage. The Art of Splitting Stone: Early Rock Quarrying Methods in Pre-Industrial New England, 1630-1825. Amesbury, MA: Powwow River Books, 2005.