Who Was the Somerton Man?

Background

Just before 7 a.m. on 1 December 1948, a couple walking on Somerton Park beach near Adelaide found a well-dressed man lying against the sea wall, apparently asleep. He was dead: a man of roughly 40 to 45, in excellent physical condition, with no wallet, no identification, and every clothing label removed or cut out. The state coroner's inquest could not determine a cause of death or an identity, and the case, formally the Somerton Man or Taman Shud case, became one of Australia's longest-standing unsolved mysteries.

Two pieces of physical evidence gave the case its enduring shape. Months after the death, a tiny scrap of paper reading "Tamam Shud", Persian for "ended" or "finished", was found sewn into a concealed pocket in the man's trousers. A public appeal located the specific copy of Edward FitzGerald's translation of the Rubaiyat of Omar Khayyam it had been torn from, discarded in a car near the beach; the book contained a local telephone number pencilled in and, on the back cover, five lines of capital letters that appeared to be a code.

Investigators traced the phone number to a young Adelaide nurse who used the name Jestyn: Jessica Thomson. She denied knowing the dead man when shown a cast of his face, though her reaction was noted by police as unusually strong, and her daughter said decades later that she believed her mother knew more than she disclosed. Another lead, a former army lieutenant named Alf Boxall to whom Thomson had given a copy of the same book in 1945, was ruled out as the victim when he turned up alive in Sydney in 1949 with his own copy intact.

Main Theories

Cold War espionage

The case surfaced at a tense moment: December 1948, as wartime alliances hardened into Cold War rivalry, and Adelaide sat within reach of two sensitive sites, the Woomera long-range weapons testing range and the Radium Hill uranium mine. Proponents of an espionage explanation point to the concealed cipher, the deliberate removal of every identifying label, and Boxall's own past service in an army intelligence unit, which he acknowledged but said he never discussed with Thomson. On this reading, the man was a courier, an agent, or a contact whose death was connected to work he could not disclose even to those closest to him.

The theory has never advanced beyond circumstance. No intelligence agency, Australian or foreign, has acknowledged a connection, no document naming him in that capacity has surfaced despite decades of freedom-of-information requests, and a coded scrap of paper is not, on its own, evidence of tradecraft; concealing a personal cipher for private reasons was not unusual practice in the period. The theory endures because it fits the setting and the found objects neatly, not because any specific claim within it has been substantiated.

An undetectable poison

The competing explanation stays within the body itself. The original pathologist, Sir John Cleland, told the 1949 inquest he would be prepared to conclude the man had died of a glucoside poison, most likely digitalis, based on unusual congestion of internal organs, but 1940s toxicology could not identify the substance directly in tissue, and the inquest returned an open finding. In 1994, Victorian Chief Justice John Harber Phillips, reviewing the case with a forensic-medicine background, argued the pattern of organ findings was consistent with digitalis poisoning, whether self-administered or not.

The poisoning theory does not by itself resolve whether the death was suicide, accident, or homicide, and it does not require an espionage motive at all: digitalis-family plants were accessible, and a man who had reportedly attempted suicide before could have chosen a method that resisted period testing precisely because it left few conventional signs. It has the advantage of resting on a documented physical finding rather than on circumstantial context, but it explains how he likely died more convincingly than it explains why.

Common Misconceptions

Identifying the body is often reported as though it solved "the Somerton Man mystery" outright; it resolved the most basic question, who he was, but left the harder ones, why he died, whether the cipher means anything, and what if any connection Jessica Thomson had to him, exactly as open as before. The two questions are logically separate: a name does not explain a death.

The cipher is also frequently described as "cracked" in recurring news cycles, almost always incorrectly. Every widely reported claimed decryption has failed to produce a verifiable, generalisable solution accepted by professional cryptographers, in the same pattern seen with the Voynich manuscript. And Jessica Thomson's evasiveness is often treated as proof of guilt in some direct sense, when it is equally consistent with an unrelated personal secret from 1948 Adelaide, a period with its own reasons for a young single mother to avoid police scrutiny.

Current Consensus

The man's identity is now settled to a high degree of confidence: Carl Webb, a Melbourne-born electrical engineer and instrument maker, born in 1905, estranged from his wife and with little documented life after 1947. Derek Abbott and Colleen Fitzpatrick's July 2022 genetic-genealogy match was independently corroborated by South Australia Police's own DNA sequencing of the exhumed remains by the end of that year, and no subsequent finding has contradicted it, a resolution that took laboratory techniques unavailable in 1948, much as chemical analysis of recovered debris rather than eyewitness testimony eventually confirmed the leading explanation for the Tunguska event. What remains genuinely open is everything about his final months and his death: no cause of death has been formally confirmed, no connection between Webb and Jessica Thomson has been established beyond the phone number, and the cipher has never been decoded by any solution that has survived expert scrutiny.

Why This Mystery Endures

The case endures because it hands the reader a complete prop box, a torn book, a hidden phone number, a five-line code, a woman who said too little, and lets each generation assemble its own story from it. Unlike a mystery with no physical evidence at all, the Somerton Man offers just enough material, much as the Voynich manuscript offers just enough legible structure, to reward close attention without ever fully yielding to it.

Its Cold War setting matters too. The same anxieties that make numbers stations compelling, the sense of a hidden apparatus of agents and codes operating beneath ordinary life, gave the Adelaide case an immediate frame in 1948 and have kept espionage a live reading ever since, even without confirming evidence. The identification of Carl Webb has, if anything, sharpened the mystery rather than closing it: a known name with an undocumented last year of life is a more specific, more human puzzle than an anonymous body ever was, and it leaves exactly the kind of unanswered "why" that keeps researchers, amateur and professional, still working the case. It is, in that sense, the mirror image of Jack the Ripper: one case resolved a name and left the crime unexplained, the other has spent well over a century failing to resolve a name at all. D. B. Cooper offers a different mirror still: a case built around a name rather than a body, and one that, unlike Adelaide's, has never produced remains to identify at all.

The Man in the Iron Mask inverts the puzzle again: a fully documented life in custody surrounding a name that was deliberately never recorded, rather than a well-examined body with no name attached. Kaspar Hauser offers the closest parallel to this case's own resolution mechanism: DNA testing eventually named the Somerton Man, while for Hauser the same kind of genetic analysis has only ever ruled candidate identities out, a reminder that forensic science resolves these cases unevenly, when it resolves them at all. All these cases are covered in this site's mysterious people cluster, alongside the rest of this site's unresolved historical cases in the historical mysteries hub.