Robinson, John J.: Born in Blood. The Lost Secrets of Freemasonry, s. 56. New York: Evans, 1989. ”... by the late fifteenth century virtually every man in England was free.” ISBN 9780871316028OCLC:20419501 Robinson also states that the presence of the requirement meant that Freemasonry was organisationally much older than the 1717 founding of the Premier Grand Lodge of England.
