Quotes:Yarker, John
Zirkoff, Boris
Yarker, John (1833-?), *Notes on the Scientific and Religious Mysteries of Antiquity, etc., 1872; 2nd ed., New York: J. W. Bouton, 1878.
Source: Boris de Zirkoff, «H. P. Blavatsky Collected Writings», vol. 1, p. 534