Question: What escaped convict is the novel STrandloper loosely based on?

full_context: Document 1: Strandloper (novel): Strandloper is a novel by English writer Alan Garner, published in 1996. It is loosely based on the story of a Cheshire labourer, William Buckley. The historical figures of Edward Stanley and John Batman also appear as characters in the novel.
Document 2: Ruth Bowyer: Ruth Bowyer (c. 1761 – 5 June 1788), also known as Ruth Baldwin, was an English convict sent to Australia aboard a ship of the First Fleet. Convicted in 1786 for the theft of five spoons from a Surrey hotel, she was sentenced to seven years transportation but died two years later and was buried beside the shore of Sydney Cove.
Document 3: Boneland: Boneland is a 2012 novel by Alan Garner, a sequel to "The Weirdstone of Brisingamen" and "The Moon of Gomrath". The boy Colin from the earlier novels is now an adult, still living near the top of Alderley Edge but now a Professor working at the nearby Jodrell Bank Observatory. His solitary home is a kit-built hut ("A Bergli") in a quarry. He has a form of amnesia which means he remembers nothing from before the age of 13, including his twin sister and his childhood adventures. He visits a psychotherapist and the gradual uncovering of his past forms the main story.
Document 4: Broken Lives: Broken Lives was written by Estelle Blackburn between 1992 and 1998. The book is about the false imprisonment of two people, John Button and Darryl Beamish who were both convicted for murders that were later proved to be committed by Eric Cooke the last man hanged in Western Australia in the Fremantle Gaol.
Document 5: St James' and St Paul's Church, Marton: The Church of St James and St Paul is situated to the south of the village of Marton, Cheshire, England. It is recorded in the National Heritage List for England as a designated Grade I listed building. It is an active Anglican parish church in the diocese of Chester, the archdeaconry of Macclesfield and the deanery of Congleton. Its benefice is combined with those of Holy Trinity, Capesthorne, Christ Church, Eaton, and All Saints, Siddington. The church is an important location in the novel Strandloper by Alan Garner.
Document 6: Bungaree: Bungaree, or Boongaree, (1775 – 24 November 1830) was an Aboriginal Australian from the Broken Bay area, who was known as an explorer, entertainer, and Aboriginal community leader.
Document 7: William Buckley (convict): William Buckley (178030 January 1856) was an English convict who was transported to Australia, escaped, was given up for dead, and lived in an Aboriginal community for many years.
Document 8: Moreton Bay (song): Moreton Bay is an Australian folk ballad which tells of the hardship a convict experienced at penal settlements around Australia, in particular, the penal colony at Moreton Bay, Queensland which was established to house convicts who had reoffended in settlements in New South Wales. The song references exceptionally brutal treatment of convicts while the colony was under the command of the infamous Patrick Logan. It also describes Logan's death at the hands of local Aborigines and the joy felt by the convicts upon hearing the news. The song may have been composed at the time of Logan's death on or soon after 18 October 1830. A version entitled "The Convict's Arrival" or "The Convict's Lament on the Death of Captain Logan" has been attributed to Francis MacNamara who was transported to Australia in 1832 and was never held at Moreton Bay. It is customarily sung to the tune of "The dark eyed youth" (also known as "Eochaill"), which was used later for the song "Boolavogue", the lyrics of which were written in 1897 for the centenary of the Irish Rebellion of 1798.
Document 9: Alan Garner (disambiguation): Alan Garner is an English author.
Document 10: The Secret River: The Secret River, written by Kate Grenville in 2005, is a historical novel about an early 19th-century Englishman transported to Australia for theft. The story explores what might have happened when Europeans colonised land already inhabited by Aboriginal people. The book has been compared to Thomas Keneally's "The Chant of Jimmie Blacksmith" and to Peter Carey's "True History of the Kelly Gang" for its style and historical theme.
Document 11: The Weirdstone of Brisingamen: The Weirdstone of Brisingamen: A Tale of Alderley is a children's fantasy novel written by the English author Alan Garner (born 1934). Garner began work on the novel, his literary debut, in 1957 after he moved into the late mediaeval house Toad Hall, in Blackden, Cheshire. The story, which took the local legend of The Wizard of the Edge as a partial basis for the novel's plot, was influenced by the folklore and landscape of the neighbouring Alderley Edge where he had grown up. Upon completion the book was picked up by the publisher Sir William Collins who released it through his publishing company Collins in 1960.
Document 12: Watling Street (book): Watling Street: Travels Through Britain and Its Ever-Present Past is the fifth book by the British journalist, novelist and cultural historian John Higgs. The book charts Higgs's journey along Watling Street, one of the oldest roads in Britain, from Dover to Anglesey, during which journey he records the so-called hidden history of this ancient path from its first creation up to the present day. As well as recording the historical figures and their stories surrounding the road, Higgs also meets up with and interviews contemporary figures along the way such as Alan Moore. The author describes the history of the road as, "Watling Street is a road of witches and ghosts, of queens and highwaymen, of history and myth, of Chaucer, Dickens and James Bond. Along this route Boudicca met her end, the battle of Bosworth changed royal history, Bletchley Park code breakers cracked Nazi transmissions and Capability Brown remodelled the English landscape.
Document 13: Alan Garner: Alan Garner OBE (born 17 October 1934) is an English novelist best known for his children's fantasy novels and his retellings of traditional British folk tales. Much of his work is firmly rooted in the landscape, history and folklore of his native county of Cheshire, North West England, being set in the region and making use of the native Cheshire dialect.
Document 14: William Sykes (convict): William Sykes (  1827 – 4 January 1891) was an English convict, transported to Western Australia for manslaughter.
Document 15: Richard Craig (adventurer): Richard Craig (1812 – 14 July 1855) was a free settler in the Australian colony of New South Wales, a convicted criminal, an escaped convict, and a pardoned convict who worked as a stockman and drover.
ground_truth: William Buckley