Who is Count Stefan Colonna Walewski?

Please refer to the following quote:

''[...]Count Walewski. A teacher of physics Vladimir P. Kovtun brought us a school exercise-book, with the chapters of this manuscript rewritten.

A first publication of the manuscript by Kont (Count) Stefan Colonn Walewski was in US in 1955. The high life of Kont (Count) Stefan Colonna Walewski was the life of a famous collectioner, who owned the shop "Esoterica" in New-York. But very few knew, that in early 20 years in the mountains of Caucas he was consecrate into a secret society, which combined local traditions, traditions of Yoga with teachings, branched from the mystic traditions of ancient Zoroaestrism[...]''