Quotes:Cox, Ross

Zirkoff, Boris

Cox, Ross (1793-1853). *Adventures on the Columbia River, etc. London: H. Colburn and R. Bentley, 1831. 2 vols.; 3rd ed. entitled The Columbia River, etc., 1832.

Source: Boris de Zirkoff, «H. P. Blavatsky Collected Writings», vol. 5, p. 372