During WWII, George DeMohrenschildt just happened to spend a week or more at the DC home of a active duty US Navy officer.
The officer, retired by 1962 as an Admiral, resided in the large DC home he had inherited from his late
STEP-father,
a typewriter manufacturer executive credited with perfecting the Japanese diplomatic code breaking machine
John Hurt relied
In 1962, the Admiral was murdered near his home on the Chicago lake front. Robbery was ruled out as the motive,
his assailant was never identified.
https://www.nytimes.com/1962/10/23/archives/retired-admiral-slain-in-chicago-paul-joachim-is-shot-by-gunman-on.html
RETIRED ADMIRAL SLAIN IN CHICAGO; Paul Joachim Is Shot by Gunman on Street
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Oct. 23, 1962
CHICAGO, Oct. 22 (AP)--A 50-year-old retired rear admiral resisted an apparent holdup attempt early today and was shot to death in a street near his apartment in the Gold Coast area on the near North Side.
Paul L. Joachim was a 1934 Annapolis Academy graduate. During the Korean War, he was executive officer on the USS New Jersey. He attained the rank of Rear Admiral on the occasion of his retirement. Joachim was shot four times and killed in a presumably still unsolved murder on October 21, 1962, in front of 1350 Lake Shore Drive in Chicago. Joachim was residing at 1400 Lake Shore Drive, in business as an art dealer.
Joachim's mother, Elmina Nance, married Dr. Paul L. Joachim of Washington, DC in 1910. Their other son was Phillip Nance Joachim, later an Associated Press editor. The widowed Elmina Nance Joachim later married Carl A. Joerissen, an Underwood Typewriter Co. executive and design engineer based in the Underwood, DC office. Elmina and Carl had a daughter named Kay, who married attorney and Coast Guard Reserve Lt. CDR William Helvestine in 1944. Helvestine died in a January, 1947, private airplace crash. Helvestine's brother, Albert Harrison Helvestine was the US Navy's patent attorney.
The most interesting details of Paul L. Joachim's background are that his stepfather, Carl A. Joerissen is reported by one source to have been the chief engineer of LF Safford. In 1924, these two men quickly designed and sold the first KATA-KANA typewriters to ONI (aka CSP-62, RIP-5 or Underwood Code Machine "RIP-5").
Laurance F. Safford went on to oversee the WWII US Navy Cryptographers, and he worked with Frank Rowlett to perfect the PURPLE code breaking machinery.
Another curiousity is that Carl A. Joerissen was associated with Gertrude Laughlin Joerissen, a linguist who translated Chinese and Japanese poetry. This Gertrude is not the daughter of US Ambassador to Spain, Laughlin.
The fact that the brother-in-law of Paul Joachim's sister, Kay, was the longtime, US Navy patent attorney is also intriguing. How did George De Mohrenschildt manage to insinuate himself with navy officer Paul Joachim, and Henry C. Bruton? Is it only coincidence that Paul Joachim was murdered in the same general time period that Edwin Walker was shot at, and also when Thomas J. Devine's foreign service brother-in-law went missing and washed up dead, considering that the dead man's brother, Howard Bucknell, III was a Navy submarine commander? Does any of this increase the significance of De Morhenschildt's introduction of Oswald to Henry C. Bruton?
AI Overview
Elmina Nance Joachim Joerissen (1887–1976) was a prominent Washington, D.C. socialite, former actress, and wife of the prominent diplomat Carl Augustus Joerissen. She frequently appeared in the capital's society pages in the 1930s and 1940s and later became a fixture in local amateur theater.She was also the central figure identified by historians in an iconic historic photograph and flag collage, which was famously featured on the Family Tree Magazine platform.
https://oztypewriter.blogspot.com/2021/04/taking-it-home-to-place-it-belongs-west.html
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In 1930 Joerissen swapped his home at 1619 Massachusetts Avenue, Washington DC, for Ross’s house in Paris, on a 15-year lease deal. However, Joerissen’s wife became ill and the couple returned to Washington, where Gertrude died in the Mayflower Hotel in 1933. Joerissen, at the age of 63, remarried the next year and he and Elmina, the former Mrs Joachim (née Nance, 1888-1976), took up residence at 2100 Massachusetts Avenue. Carl adopted his second wife’s children. The Joerissens moved to 6900 Connecticut Avenue, Chevy Chase, just across the district line in Maryland. A $10,000 robbery there in 1938 gives a clue to their wealth: the theft included a mink coat, a silver-fox coat, linen, silverware and jewelry.