Background: Hugh Redwald Trevor-Roper, Baron Dacre of Glanton, FBA (15 January 1914 - 26 January 2003), was a British historian of early modern Britain and Nazi Germany. He was Regius Professor of Modern History at the University of Oxford. Trevor-Roper was made a life peer in 1979 on the recommendation of Prime Minister Margaret Thatcher, choosing the title Baron Dacre of Glanton. Trevor-Roper was a polemicist and essayist on a wide range of historical topics, but particularly England in the 16th and 17th centuries and Nazi Germany.
Context: On 4 October 1954, Trevor-Roper married Lady Alexandra Henrietta Louisa Howard-Johnston (9 March 1907 - 15 August 1997), eldest daughter of Field Marshal Earl Haig by his wife, the former Hon. Dorothy Maud Vivian. Lady Alexandra was a goddaughter of Queen Alexandra and had previously been married to Rear-Admiral Clarence Dinsmore Howard-Johnston, by whom she had had three children. There were no children by his marriage with her. Hugh Trevor-Roper was raised to the Peerage on 27 September 1979, and was introduced to the House of Lords as Baron Dacre of Glanton, of Glanton in the County of Northumberland; he was granted this title being a great-great-great-grandson of the Hon. and Reverend Richard Henry Roper, second and youngest son of Anne, (16th) Baroness Dacre, by her second marriage to Henry Roper, 8th Baron Teynham, and was in remainder to the ancient barony of Dacre. In his last years he had suffered from failing eyesight, which made it difficult for him to read and write. He underwent cataract surgery and obtained a magnifying machine, which allowed him to continue writing. In 2002, at the age of 88, Trevor-Roper submitted a sizable article on Thomas Sutton to the Oxford Dictionary of National Biography in part with notes he had written decades earlier, which editor Brian Harrison praised as "the work of a master". Trevor-Roper suffered several other minor ailments related to his advanced age, but according to his stepson, "bore all his difficulties stoically and without complaint". That year, he was diagnosed with cancer and died on 26 January 2003 in a hospice in Oxford, aged 89. Trevor-Roper's personal assets were assessed for probate purposes as PS1,638,119 and he was cremated following a memorial service at the Church of St. Thomas the Martyr in Oxford.
Question: What work did he submit in his latter years?
Answer: a sizable article on Thomas Sutton to the Oxford Dictionary of National Biography in part with notes he had written decades earlier,

Background: The Beatles were an English rock band formed in Liverpool in 1960. With members John Lennon, Paul McCartney, George Harrison and Ringo Starr, they became widely regarded as the foremost and most influential music band. Rooted in skiffle, beat and 1950s rock and roll, the Beatles later experimented with several musical styles, ranging from pop ballads and Indian music to psychedelia and hard rock, often incorporating classical elements and unconventional recording techniques in innovative ways. In 1963 their enormous popularity first emerged as "Beatlemania"; as the group's music grew in sophistication, led by primary songwriters Lennon and McCartney, the band were integral to pop music's evolution into an art form and to the development of the counterculture of the 1960s.
Context: Touring internationally in June and July, the Beatles staged 37 shows over 27 days in Denmark, the Netherlands, Hong Kong, Australia and New Zealand. In August and September they returned to the US, with a 30-concert tour of 23 cities. Generating intense interest once again, the month-long tour attracted between 10,000 and 20,000 fans to each 30-minute performance in cities from San Francisco to New York. In August, journalist Al Aronowitz arranged for the Beatles to meet Bob Dylan. Visiting the band in their New York hotel suite, Dylan introduced them to cannabis. Gould points out the musical and cultural significance of this meeting, before which the musicians' respective fanbases were "perceived as inhabiting two separate subcultural worlds": Dylan's audience of "college kids with artistic or intellectual leanings, a dawning political and social idealism, and a mildly bohemian style" contrasted with their fans, "veritable 'teenyboppers' - kids in high school or grade school whose lives were totally wrapped up in the commercialised popular culture of television, radio, pop records, fan magazines, and teen fashion. To many of Dylan's followers in the folk music scene, the Beatles were seen as idolaters, not idealists." Within six months of the meeting, according to Gould, "Lennon would be making records on which he openly imitated Dylan's nasal drone, brittle strum, and introspective vocal persona"; and six months after that, Dylan began performing with a backing band and electric instrumentation, and "dressed in the height of Mod fashion". As a result, Gould continues, the traditional division between folk and rock enthusiasts "nearly evaporated", as the Beatles' fans began to mature in their outlook and Dylan's audience embraced the new, youth-driven pop culture. During the 1964 US tour, the group were confronted with the reality of racial segregation in the country at the time, particularly in the South. When informed that the 11 September show at the Gator Bowl in Jacksonville, Florida was to be held at a segregated venue, the Beatles expressed astonishment and announced that they would refuse to perform unless the show become integrated. Lennon stated: "We never play to segregated audiences and we aren't going to start now ... I'd sooner lose our appearance money." The group's stand drew controversy in the local media, but city officials relented and agreed to allow an integrated show. On the tour the group also refused to stay in segregated hotels. Documents reveal that for their subsequent US tours in 1965 and 1966, the Beatles included clauses in contracts stipulating that shows be integrated.
Question: Why did they meet Bob Dylan?
Answer:
the musical and cultural significance of this meeting, before which the musicians' respective fanbases were "perceived as inhabiting two separate subcultural worlds":