around the world. He later flirted with California oil projects, Chilean copper mines, and Chihuahua, Mexico railroads and silver-lead mines, but his great works had been completed. Recognitions In 1916, he was recognized for his contributions by his election as president of the American Institute of Mining Engineers. Earlier, in 1910, he had been recognized with the gold medal from the Institution of Mining and Metallurgy, Great Britain. He received the degree of L. L. D. from the University of Arizona in 1916, and doctor of engineering from Princeton in 1925. He was elected a Trustee to Princeton, where he maintained a home for his mother and sister (formerly the home of friend, President Woodrow Wilson), and was a donor to and served as trustee of Caltech. In 1940 he was awarded the gold medal, named after his mentor James Douglas, of the American Institute of Mining, Metallurgical and Petroleum Engineers. Personal Ricketts suffered a serious illness in 1917. While he did recover, and resumed his consulting practice, he did not undertake any major new projects. He retired to Pasadena, California, where he died in 1940. He retained his connection with Arizona, being chairman of the Valley National Bank, Phoenix, and a director of Phelps Dodge at the time of his death. In 1916, Ricketts married Kate Bruce Greenway, widow of his partner John C Greenway's brother. They had no children. His brother Palmer C. Ricketts was president of Rensselaer Polytechnic Institute. See also Ricketts House at Caltech References "Dr. Louis D. Ricketts" in Forrest R. Rickard, 1996, The Development of Ajo, Arizona (Ajo, Arizona, self-published), LC 96-92729 American mining engineers American geologists 1859 births 1940 deaths American bankers