Hennen Jennings died at Washington, D.G., on March 5th, 1920, of heart trouble, from which he had suffered for nearly a year previous.
He was 66 years of age, having been born at Hawesville, Kentucky, in 1854. He graduated from the Lawrence Scientiﬁc School at Harvard in 1877, and went to California, where he was successively engineer at the North Bloomﬁeld and New Almaden mines. In 1887 he went to Venezuela as manager of the El Gallao mine, where he remained for about two years.
Leaving South America in 1889, he went to South Africa as engineer to Jules Porges & Co., and when that ﬁrm was transformed into Wernher, Beit & Co. he was appointed consulting engineer, a position which he retained until his retirement in 1905. The last, seven years of the period were spent in London.
In 1906 Mr. Jennings returned to the United States, and started practice as all consulting mining engineer in Washington, his services being respectively required ﬁrst by the Conrey Placer Co., Montana, in which Harvard University had acquired a considerable interest, and by the U.S. Bureau of Mines. In 1918 he undertook an investigation of the gold-mining industry, with which his previous career rendered him exceptionally conversant. During his residence in London he was elected President of the Institution of Mining and Metallurgy for two successive years, 1903-4 and 1904-5. In 1908 he was awarded the Gold Medal of the Institution ‘in recognition of his services in the development of the Mining Industry in South, Africa, in improving the status of the Mining and Metallurgical Profession, and in the cause of Mining and Metallurgical Education in London and South Africa.’
Mr. Jennings was elected a Member of the Institution in 1894.
Vol. 30, Trans IMM 1920-21, pp.476-7.