In the late 1950s he lived in
Venice,
California, then the centre of the Southern California
Beat scene. In October 1955, he became involved with the
Lettrist International and then the
Situationist International. His text "Invisible Insurrection of a Million Minds" was published in the Scottish journal
New Saltire in 1962 and subsequently as "Technique du Coup du Monde" in
Internationale Situationniste, number 8. It proposed an international "spontaneous university" as a cultural force and marked the beginning of his movement towards his
sigma project, which played a formative part in the
UK Underground. Trocchi appeared at the 1962 Edinburgh Writers Festival where he claimed "
sodomy" as a basis for his writing. During the festival,
Hugh MacDiarmid denounced him as "cosmopolitan scum". However, while this incident is well known, it is little remarked upon that the two men subsequently engaged in correspondence, and actually became friends. Trocchi then moved to London, where he remained for the rest of his life. He began a new novel,
The Long Book, which he did not finish. Much of his sporadic work of the 1960s was collected as
The Sigma Portfolio. In March 1966 the
Internationale Situationniste, issue number 10, announced "Upon the appearance in London of the first publications of the 'Project Sigma' initiated by Alexander Trocchi, it was mutually agreed that the SI could not involve itself in such a loose cultural venture... It is therefore no longer as a member of the SI that our friend Alexander Trocchi has since developed an activity of which we fully approve of several aspects." He continued writing but published little. He opened a small book store near his
Kensington home. He was known in Notting Hill as "Scots Alec". In the 1960s and '70s, Trocchi lived at 4 Observatory Gardens, Kensington, London on the two top floors of a 19th-century terrace block comprising six storeys. He had two sons: Marc Alexander and Nicholas. The elder son, Marc died of cancer at age 19 in 1976, shortly after Alexander's American wife Lyn died of complications from hepatitis. After undergoing surgery for lung cancer, he died of
pneumonia in London on 15 April 1984. He was cremated at
Mortlake Crematorium. The younger son, Nicholas, returned to the family's home in London less than a year after his father's death and leapt to his death from the top floor of the five-storey building. When the terrace block was extensively refurbished into luxury apartments in the 1980s, the number on Alexander Trocchi's house was removed. ==Resurgence==