Josef Hassid (28 December 1923, Suwałki, Poland — 7 November 1950, Surrey, England) was a Polish-British child prodigy and virtuoso violinist, celebrated by prominent musicians of his time as one of the most exceptionally talented young players. His esteemed teacher, the renowned pedagogue Carl Flesch, recounted in his memoirs that Fritz Kreisler, after hearing 15-year-old Josef perform, remarked, "A fiddler like Heifetz is born every 100 years; one like Hassid every 200 years." Despite his remarkable talent, Hassid struggled with a debilitating mental illness, experiencing his first "memory lapse" on stage at the tender age of twelve. Diagnosed with schizophrenia at 18 in 1941, he spent the remainder of his life in mental institutions. Tragically, Josef underwent a lobotomy in October 1950, which led to complications resulting in his death at the age of 27.
Born into a Jewish family as the third of four children in a small town in northeastern Poland, Josef Chasyd began his musical education at an early age. In 1934, at the age of eleven, he enrolled at the Fryderyk Chopin University of Music in Warsaw, studying under Mieczysław Michałowicz and Irena Dubiska. By his sophomore year, he entered a prestigious competition but suffered a mental breakdown described as a "memory lapse." Nevertheless, the jury recognized his talent by awarding him an honorary diploma. Shortly thereafter, Josef's father arranged an audition with the distinguished Polish violinist Bronislaw Huberman, who was highly impressed by his exceptional abilities. Huberman subsequently contacted the eminent Hungarian violinist and teacher Carl Flesch, facilitating Josef's participation in Flesch's summer courses in Belgium in 1937, where Flesch was equally taken by his playing.
In 1938, Hassid traveled to England with his father to continue his studies under Flesch, who had relocated to London after fleeing the Nazi regime. Several prominent violinists, including Joseph Szigeti, Jacques Thibaud, David Oistrach, and Fritz Kreisler, visited Flesch's home to hear young Josef play, all of whom praised his innate dexterity and rapid progress in both musical and interpretative skills. Josef gave private recitals, including a performance in March 1938 at the residence of Leon Lazar Gildesgame in South Hampstead, where he played before notable figures such as Sir Henry Wood.
Hassid made his critically acclaimed public debut at Wigmore Hall in April 1940, where, billed as the "Polish Boy Violinist," he performed alongside pianist Gerald Moore. Their program featured Corelli's La Follia variations, Schubert's Sonata in G, and works by Debussy, J.S. Bach, and Paganini. Shortly after, he led a concert for the "Polish Relief Fund" with the London Philharmonic Orchestra under conductor Grzegorz Fitelberg at Queen's Hall, London, which was broadcast on BBC Home Service. Unfortunately, during this performance, Josef experienced another "memory lapse" while playing Tchaikovsky's Violin Concerto, but he managed to recover and finish the second half with Beethoven's Seventh Symphony.
Despite the initial acclaim and public success, Josef began to exhibit more pronounced signs of mental distress, which ultimately disrupted his promising career. By February 1941, he was struggling with severe mood swings and had abandoned the violin. His condition worsened, leading to withdrawal, uncooperativeness, and even failing to recognize familiar faces. In June 1941, he was committed to St Andrew's Hospital in Northampton. His impresario and concert agent, Harold Holt, appealed to the hospital's superintendent for exceptional efforts to treat him, emphasizing that Hassid's talents were extraordinary and that he had the potential to become one of the greatest violinists.
Though he underwent various treatments, including insulin comas and electroconvulsive shock therapy, Josef's condition seemed to improve, and he left the hospital in May 1942. Unfortunately, he quickly relapsed and was diagnosed with "insanity" by December, leading to his admission to Moorcroft House, a private asylum in Hillingdon, Middlesex. In July 1943, he was transferred to Long Grove Hospital in Epsom, Surrey, where he would remain for the rest of his life. Following the death of his father in 1949, Josef's mental health deteriorated further. In October 1950, he underwent a bilateral prefrontal lobotomy, which led to a post-operative infection that progressed into meningitis. Josef Hassid passed away in November 1950 at the age of 27.