Question: What Australian bushranger was popularized in The Inner History of the Kelly Gang and Their Pursuers"?

Context articles: Joe Byrne
Stingaree (novel)
The Kelly Gang (play)
Jerilderie Letter
Dan Kelly (bushranger)
The Story of the Kelly Gang
Steve Hart
J. J. Kenneally
The Kelly Gang
Ned Kelly

Joseph "Joe" Byrne (November 1856 – 28 June 1880) was an Australian bushranger born in Victoria to an Irish immigrant.
 A friend of Ned Kelly, he was a member of the "Kelly Gang" who were declared outlaws after the murder of three policemen at Stringybark Creek.
 Despite wearing the improvised body armour for which Ned Kelly and his gang are now famous (and which he is reputed to have designed), Byrne received a fatal gunshot during the gang's final violent confrontation with police at Glenrowan, in June 1880.
Stingaree is a 1905 novel by E. W. Hornung about an Australian bushranger.
 It was allegedly based on the Kelly Gang.
The Kelly Gang; or the Career of the Outlaw, Ned Kelly, the Ironclad Bushranger of Australia, is an 1899 Australian play about bushranger Ned Kelly.
 It is attributed to Arnold Denham but it is likely a number of other writers worked on it.
The handwritten document known as the Jerilderie Letter was dictated by Australian bushranger Ned Kelly to fellow Kelly Gang member Joe Byrne in 1879.
 It is one of only two original Kelly letters known to have survived.
Daniel "Dan" Kelly (1 June 1861 – 28 June 1880) was an Australian bushranger and outlaw.
 The son of an Irish convict, he was the younger brother of the bushranger Ned Kelly.
 Dan and Ned killed three policemen at Stringybark Creek in northeast Victoria, near the present-day town of Tolmie, Victoria.
 With two friends, Joe Byrne and Steve Hart, the brothers formed the Kelly Gang.
 They robbed banks, took over whole towns, and kept the people in Victoria and New South Wales frightened.
 For two years the Victorian police searched for them, locked up their friends and families, but could not find them.
 Dan Kelly died during the infamous siege of Glenrowan.
The Story of the Kelly Gang is a 1906 Australian silent film that traces the exploits of 19th-century bushranger and outlaw Ned Kelly and his gang.
 It was directed by Charles Tait and shot in and around the city of Melbourne.
 The film ran for more than an hour with a reel length of about 1200 m , making it the longest narrative film yet seen in the world.
 It was first shown at Melbourne's Athenaeum Hall on 26 December 1906 and premiered in the United Kingdom in January 1908.
 A commercial and critical success, it is regarded as the origin point of the bushranging drama, a genre that dominated the early years of Australian film production.
 Since its release, many other films have been made about the Kelly legend.
Stephen "Steve" Hart (13 February 1859 – 28 June 1880) was an Australian bushranger renowned for his membership in the Kelly Gang.
J. J. Kenneally (born James Jerome Kenneally; 1870 – 20 February 1949) was an Australian journalist and trade unionist.
 An early populariser of Australian bushranger Ned Kelly and his gang via his book "The Inner History of the Kelly Gang and Their Pursuers" (1929), he was also one of the original members of the country's Labor Party and later formed his own party.
The Kelly Gang is an Australian feature-length film about the Australian bush ranger, Ned Kelly.
 The film was released in 1920, and is the second film to be based on the life of Ned Kelly, the first being "The Story of the Kelly Gang", released in 1906.
Edward "Ned" Kelly (December 1854 – 11 November 1880) was an Australian bushranger, outlaw, gang leader and convicted police murderer.
 Recognised as the last and most famous of the bushrangers, he is best-known for wearing a self-made suit of bulletproof armour during his final shootout with the police.