Morris K. Jessup
Astronomer and UFO author who investigated antigravity and the Philadelphia Experiment, found dead in his car under disputed circumstances.
| Field | Details |
|---|---|
| Full Name | Morris Ketchum Jessup |
| Born | March 20, 1900 |
| Died | April 20, 1959 |
| Age at Death | 59 |
| Location of Death | Dade County Park, near Coral Gables, Florida |
| Cause of Death | Carbon monoxide poisoning (hose from exhaust to car window) |
| Official Ruling | Suicide |
| Category | UFO Researcher / Author |
Assessment: SUSPICIOUS
Jessup's death has been disputed since 1959. He reportedly called a friend the evening before his death in "unexpectedly joyful and high spirits," claiming a breakthrough in his Philadelphia Experiment research and arranging a lunch meeting for the next day. He was found dead the following afternoon. While friends confirmed he had been depressed in prior months, the timing — the night before a meeting where he planned to share new findings — is the core suspicious element.
Circumstances of Death
On the evening of April 19, 1959, Jessup telephoned his friend Dr. Manson Valentine, a zoologist and oceanographer. According to Valentine, Jessup was enthusiastic and animated, spending over an hour discussing his latest research. Jessup claimed to have made a significant breakthrough regarding the Philadelphia Experiment and invited Valentine to lunch the next day.
On April 20, 1959, at approximately 6:30 PM, Jessup's body was found in his station wagon in a county park near Coral Gables, Florida. A garden hose had been attached from the exhaust pipe to a rear window of the vehicle. The car's engine was still running. The death was ruled a suicide by the Dade County medical examiner.
Background
Morris Jessup earned a master's degree in astronomy from the University of Michigan and did additional doctoral-level work. He conducted astronomical research in South America, studying ancient ruins and the possibility of extraterrestrial influence on early civilizations.
In 1955, Jessup published The Case for the UFO, which became a bestseller. The book argued that UFOs used antigravity propulsion related to unified field theory. Following publication, Jessup received a series of letters from a man calling himself "Carlos Allende" (later identified as Carl Meredith Allen), who claimed to have witnessed a secret Navy experiment in 1943 — the so-called Philadelphia Experiment — in which the USS Eldridge was allegedly rendered invisible.
The Office of Naval Research (ONR) took an unusual interest in Jessup's annotated copy of his book, which contained handwritten margin notes allegedly by three different individuals discussing antigravity technology. The ONR had the Varo Manufacturing Company produce a limited print run of the annotated edition, which has become legendary in UFO literature.
After his first book, Jessup's subsequent publications sold poorly. His publisher rejected multiple manuscripts. In 1958, his wife left him. He relocated to New York, then returned to Florida, where he was involved in a serious car accident that left him in poor health. Friends described him as increasingly despondent.
Why This Death Possibly Raises Questions
- The night before his death, Jessup reportedly called Valentine in high spirits, claiming a research breakthrough — this contradicts the depression-based suicide narrative
- He scheduled a lunch meeting with Valentine for the very next day, suggesting he had future plans
- The ONR's unusual interest in his annotated book — having a military contractor reprint it — suggests his work had touched on genuinely classified material
- Carlos Allende/Carl Allen, the source of the Philadelphia Experiment story, was described by some as a disinformation agent
- Several UFO researchers who have examined the case believe the "suicide" was staged
- However, multiple friends confirmed Jessup had discussed suicide in the months prior, and his personal circumstances (divorce, car accident, professional failure) provided a plausible motive
Key Quotes from Media Coverage
"On the night before the 'suicide' Jessup was in unexpectedly joyful and high spirits: he spent more than an hour chatting on the phone with his old friend Manson Valentine, expressing enthusiasm for his latest work." — Infinity Explorers
"The circumstances of Jessup's apparent suicide [were] mysterious." — Various UFO researchers, as compiled by the Skeptical Inquirer
See Also
- James McDonald — Another UFO researcher whose death was ruled suicide
- Frank Edwards — UFO author who died the same decade
- Edward Ruppelt — Project Blue Book director who died young in 1960
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Sources
- Morris K. Jessup — Wikipedia
- Solving a UFOlogical 'Murder': The Case of Morris K. Jessup — Skeptical Inquirer
- The Mysterious Death of Ufologist Morris K. Jessup — Infinity Explorers
- Morris K. Jessup — The UFO Database
- Morris K Jessup – UFOs & Death — Imperidox
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