Hennen Jennings was a mining engineer. He graduated from Harvard in 1877 and worked in gold and quicksilver mines in California for the next ten years. In 1887 he went to Venezuela. Two years later he moved on to South Africa, where he was a consulting engineer for the Rand mines in the Transvaal district. He was credited with developing South African gold mining into a commercially viable industry. After returning to the United States in 1905, he consulted for the Conrey Placer Mining Company of Ruby, Montana, which was largely owned by Harvard. He also consulted for the U.S. Bureau of Mines. He was a founder and director of the Research Corporation, a stock company formed in New York to support scientific and technical advances.
From the description of Hennen Jennings papers, 1874-1930. (University of Wyoming, American Heritage Center). WorldCat record id: 23885084
