Quotes:Van Oven, Barnard
Zirkoff, Boris
Van Oven, Barnard. Most likely work implied is his On the Decline of Life in Health and Disease; being an attempt to investigate the causes of longevity, and the best means of attaining a healthful old age. London: J. Churchill, 1853, 8vo., pp. 300.
Source: Boris de Zirkoff, «H. P. Blavatsky Collected Writings», vol. 4, p. 668