He was a 1903 graduate of the University of Minnesota's College of Science and Engineering, having earned a degree in geology. He also graduated from the Graduate Schools of Applied Sciences at Harvard in 1912 with a degree in Mining Engineering. He listed his occupation as a mining engineer on the census records from 1900 through 1940. Around 1931, he spent some time in Africa, where he ran a gold mining operation. In 1935 he resided in Rhodesia and was a partner in the large Roan Antelope cooper mine there. During World War II, he and his family lived in Little Rock, Arkansas, having moved from Palm Beach, Florida, which was on the coast and perhaps more dangerous at that time. In 1953 and perhaps before, Thorold was a member of the sub-committee on Raw Materials for the Atomic Energy Advisory Board. His ties to Africa and uranium deposits there may have played a role in his appointment. The family has a photo of Thorold standing next to J. Robert Oppenheimer, which was probably during the Bikini bomb testing.
He was described as 5 feet, 6 1/2 inches tall, full forehead, blue eyes, straight nose, medium mouth, round chin, brown hair, fair complexion, and oval face on his United States passport application. Thorold married Katherine Van Vleck on 20 June 1931 in Superior, Wisconsin. The family photo is of Thorold and his wife and their two children, Cyrus III and Katherine.
Thorold Farrar Field
March 6, 1884 - June 13, 1960
(note the miner's picks in center)
Katherine Van Vleck Field
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