Vital statistics
Sex Male
Nationality Bohemian
Occupation Scientist
Behind the scenes
Appearances "The Adventure of the Creeping Man"

H. Löwenstein is a Bohemian quack doctor who lived in Prague, infamous for his search for rejuvenation elixirs. Professor Presbury, smitten with a young woman, travelled to Prague to buy one of his elixirs to rejuvenate himself, and continued to receive supplies after returning to England, through Löwenstein's associate, Dorak.

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