Jiu-Jitsu Combat Tricks: A Classic Guide to the Ancient Art
H. Irving Hancockwas an American chemist and writer who wrote prolifically in the late nineteenth and early twentieth century. Best known for his fictional novel centered on the idea of a German invasion of the United States, Hancock also held an avid interest in health and exercise. His writings on Jiu-Jitsu were some of the first to be widely read in the United States. He died in 1922.