The clientele.

Catherine Cashin's mother, described in the Newgate Calendar as a Dublin widow 'of great respectability and considerable fortune,' brought Catherine and her younger, consumptive sister to London in August 1830 to seek John St John Long's help for the younger sister. Long judged the younger sister beyond treatment but persuaded the mother to let him treat the entirely healthy Catherine preventively; the Newgate Calendar records she was 'twenty-four years of age and in the full enjoyment of health' when he began. His liniment raised a large, severely infected wound; the surgeon Benjamin Brodie was called in only over Long's objections, and Catherine died the following morning. A coroner's inquest returned a manslaughter verdict, and Long was convicted of manslaughter at the Old Bailey on 23 October 1830 and fined £250.

Brown-Séquard administered five subcutaneous injections of aqueous testicular extract to himself over an 18-day period in spring 1889, then reported the results to the Société de Biologie on 1 June 1889. The self-administration is the empirical basis of his published claims and the defining methodological feature of the case: a developer who is also his own first patient and his own outcome reporter, with no blinding, no controlled comparison, and no independent assessment. He is included in the archive as a Person distinct from his Practitioner record in order to surface the role-overlap explicitly. Brown-Séquard died in Paris on 1 April 1894, less than five years after the self-injection, without having demonstrated objective rejuvenation.

Chaplin was a patient at Clinique La Prairie during his later years in Switzerland. He settled in Vevey, near Clarens, in 1952 after leaving the United States during the McCarthy period, and was within thirty minutes' drive of Niehans's clinic for the remainder of his life. The connection between Chaplin and the clinic is widely repeated in clinic materials and popular accounts but is not independently documented in primary sources. Chaplin's inclusion among the patients gave Niehans's practice cultural reach into Hollywood and the European arts community, alongside the political reach provided by Adenauer and the religious-institutional reach provided by Pius XII.

Byers was a Pittsburgh industrialist (Yale graduate, 1900s) and 1906 U.S. Amateur golf champion. Following a fall from a sleeping berth on a Harvard-Yale football special train in 1927 and chronic pain in his injured arm, his Pittsburgh physiotherapist Charles Clinton Moyar recommended Radithor. Byers began consuming the product in December 1927 at age 47, averaging three bottles per day at the peak of his consumption, until he stopped in October 1930 when his health deteriorated. Estimated total consumption: approximately 1,400 bottles. Clinical course (1930-1932): jaw and tooth loss, skeletal pain, anemia, and multiple radiation-induced bone cancers culminating in death in New York City on 31 March 1932 at age 51. His testimony to the Federal Trade Commission before his death directly precipitated the FTC's 19 December 1931 cease-and-desist order against Bailey Radium Laboratories. After exhumation in 1965, MIT physicist Robley Evans estimated his total lifetime radium intake at approximately 1,000 microcuries (37 MBq); the residual radium burden measured in his remains at the 1965 exhumation was about 225,000 becquerels (roughly 6 microcuries). Byers's case is the canonical 'died from own intervention' record in the modern history of patent-medicine harm.

Metchnikoff is recorded as a self-experimenter in his own longevity programme: consistent with his published recommendation of daily soured milk from childhood onward, historical accounts describe his self-experimentation with lactic-acid bacteria. He appears here as the receiving subject of the intervention as well as its promoter, the same dual role recorded for Brown-Séquard in this archive. His own course is the most direct outcome datum available: he died in 1916 at age 71, a death the modern reassessment attributes to heart failure (Mackowiak, 2013), well short of the extended lifespan his programme implied. His death is noted in the historical literature as the point at which soured milk's reputation as a life-prolonging measure faded.

Swanson is named as a patient at Clinique La Prairie during her later decades and became a public proponent of various longevity-oriented practices, including the Niehans cellular-therapy protocol. She wrote and spoke about her interest in life-extension and rejuvenation throughout the latter half of her life. Her endorsement extended Niehans's public visibility within the American entertainment industry and contributed to the export of Clinique La Prairie's reputation to the United States. Swanson is among the patients most directly involved in the popularization of the procedure beyond the European elite.

Time magazine's 16 February 1942 profile of Hauser ('Medicine: Garbo's Gayelord') describes Garbo as Hauser's 'good friend' and records her attending, seated hidden behind a screen, his nutrition lecture to Manhattan society women at the St. Regis Hotel. Wikipedia's biographical entry on Hauser also names Garbo among his notable clients and describes his diets as among the first celebrity diets, with Garbo an early follower. The archive records Garbo as a documented client/associate rather than a patient in any clinical sense: Hauser sold dietary advice, not a medical treatment with a measurable outcome for her.

Harold Fowler McCormick (1872-1941) is the patient most often named in popular accounts of Voronoff's practice. Popular sources date the procedure to the early 1920s and link it to McCormick's pursuit of the opera singer Ganna Walska. The McCormick attribution does not appear in Voronoff's own published case material (which anonymizes patients by initial and occupation) and is not securely documented in modern medical-historical reviews of the practice. The connection is included here under the unconfirmed designation: conventional in popular accounts and treated as illustrative of the patient class rather than as verified clinical fact.

The novelist Henry James was a committed adherent of Fletcherism for a period, practising the thorough chewing the doctrine prescribed. The episode is recorded in histories of the fad, including the Christen medical-history review (1997), and in accounts of James's circle, where Fletcherism circulated among literary and intellectual figures. He appears here as a patient, a prominent private individual who adopted the regimen, which illustrates the doctrine's reach into the cultural elite rather than any measured benefit.

Hufeland sent Kant a copy of his 1797 treatise Die Kunst, das menschliche Leben zu verlängern (the work later retitled Makrobiotik from its 1805 third edition). Kant responded with an open letter that engaged the longevity project approvingly and extended it to the power of the mind to master morbid feelings by resolution. Hufeland published the letter in his Journal der practischen Arzneykunde, and Kant then collected it as the third part of The Conflict of the Faculties (Der Streit der Fakultäten, 1798). Kant appears here as an endorser: the foremost philosopher of the age engaged with and lent his name to Hufeland's longevity doctrine, which is part of how the macrobiotic programme accrued intellectual authority. Kant's own addition, that mental resolution can master certain bodily states, is itself a mechanism-only proposition with no controlled-outcome support.

Rockefeller was among the prominent public figures who took up and endorsed Fletcher's mastication doctrine, advising slow and thorough chewing ('Fletcherize') in place of gobbling food. The association is recorded in histories of the fad, including the Christen medical-history review (1997), and was widely reported in the period. He appears here as an endorser whose public standing lent the doctrine visibility, not as a clinical subject; his own long life (he died in 1937 at ninety-seven) was popularly attached to such habits but is not evidence that mastication extends life.

Adenauer is named as a patient of Niehans at Clinique La Prairie in the late 1950s, when he was in his early eighties and serving as Chancellor of the Federal Republic of Germany. His treatment is attributed in Clinique La Prairie's own historical materials and popular accounts but is not independently documented in primary sources. As one of the central political figures of postwar West German reconstruction, Adenauer's patronage extended the clinic's credibility into the German-speaking political and industrial class that became a primary patient base.

Von Paradis lost her sight in early childhood. She was treated by Franz Anton Mesmer in Vienna in 1777, before his move to Paris. Mesmer reported a temporary restoration of partial sight; the report was contested by other Vienna physicians, and von Paradis's family eventually removed her from his care. The case became one of the principal early documented controversies around Mesmer's practice and is the earliest detailed patient-history record in the Mesmer literature. Von Paradis went on to a substantial career as a concert pianist and composer, performing and composing across European capitals into the 1810s. Mozart's Piano Concerto No. 18 (K. 456) is sometimes attributed to her commission, though the attribution is contested in modern musicology.

Lafayette subscribed to Mesmer's Société de l'Harmonie Universelle and was a documented patron of the practice in Paris during the early 1780s. On his return to the United States in 1784 he attempted to introduce mesmerism into American medical and political circles. He wrote to George Washington commending the practice; Washington responded with cautious interest but Benjamin Franklin (then in Paris and shortly to chair the royal commission that disconfirmed the protocol) advised against the project. Lafayette's role in the case is illustrative of the network through which the Paris elite circulated mesmerism into wider European and American social circuits. His connection is documented in his correspondence and in standard biographical literature.

The Newgate Calendar records her as 'Mrs Colin Campbell Lloyd, aged forty-eight, the wife of Captain Edward Lloyd, of the Royal Navy,' whose death in November 1830 was inquired into at the Wilton Arms, Kinnerton Street, Knightsbridge. The coroner's jury returned a verdict of manslaughter against John St John Long, stating the grounds as 'gross ignorance, and on other considerations.' Long was tried at the Old Bailey on this charge on 19 February 1831 and acquitted.

Pius XII was treated by Paul Niehans during the pope's grave illness at the Vatican in 1954. The treatment was publicized internationally and substantially elevated Niehans's clinical profile. Pius XII subsequently appointed Niehans to the Pontifical Academy of Sciences in 1955. The combination of papal patient and Pontifical Academy member became the central credentialing instrument used to market Clinique La Prairie for the remainder of the twentieth century. Pius XII appears in this archive in two roles: as patient (1954) and as endorser (1955 appointment), both functions documented in the standard biographical literature on Niehans and in the clinic's own historical materials.

Freud underwent a Steinach vasoligation on 17 November 1923, performed by Viennese urologist Victor Blum. His primary condition was oral squamous cell carcinoma of the right maxilla, diagnosed in April 1923; he had undergone excision surgery on 20 April 1923 and subsequent radiotherapy. The vasoligation was pursued on the hypothesis that endocrine rejuvenation might impede cancer recurrence, cancer then being conceptualized as a disease of senescence. Freud stated in August 1924 that the operation had produced no benefit. His cancer recurred in 1936 and he died on 23 September 1939, sixteen years after the vasoligation and the diagnosis, in London following voluntary euthanasia assisted by his physician Max Schur. Freud's vasoligation is documented in Benmoussa et al. 2020 (PMID 31705580) and Hansson et al. 2020 (PMID 32172253). The framing of this procedure as primarily a rejuvenation intervention, widespread in popular accounts, is misleading: its stated rationale was oncological, not cosmetic or libidinal.

Yeats underwent the Steinach vasoligation on 6 April 1934, at age 68, at the Harley Street clinic of Australian-born sexologist Norman Haire in London. He had sought the procedure in the belief that it would restore his declining creative and sexual energies. According to the BMJ account by Lock (1983), Haire later reported Yeats as saying that before the operation he had been unable to write anything new. Yeats wrote to a correspondent in 1937 that the procedure 'revived my creative power' and his 'sexual desire.' The Dublin press took to calling him 'the gland old man.' The final years of his life, 1934 to 1939, produced a substantial body of late poetry including 'The Spur' (1938) and other work characterized by its erotic directness. Whether the perceived renewal was physiological or psychological cannot be determined from the available evidence; no objective outcome data were collected. Yeats died in January 1939, five years after the procedure.

Maugham, who lived at the Villa Mauresque on Cap Ferrat (French Riviera) from 1928 until his death, travelled to Clinique La Prairie for cellular-therapy treatment in his later decades. The treatment is named in clinic materials and popular accounts but has no documentary linkage to Niehans in primary sources. Maugham is among the most-frequently named cultural figures associated with the clinic's mid-twentieth-century reputation among Anglophone literary and artistic patrons; his presence among Niehans's patients is often cited in the wider literature on rejuvenation tourism.