Jenkings made and maintained legendary contacts both in the underworld and the police force, and was regarded as the foremost crime reporter in Sydney for over 50 years.
[citation needed] He also refused to believe allegations about the involvement of Sydney policemen Ray Kelly, Fred Krahe and Frank Farrell in corrupt activities, saying that he had also known them personally.
The book featured interesting accounts of the lives of many famous Sydney criminals such as Kate Leigh, Tilly Devine, John 'Chow' Hayes, William 'Joey' Hollebone, Nellie Cameron, "Pretty" Dulcie Markham, Robert "Pretty Boy" Walker, Richard "Dick" Reilly, "Greyhound" Charlie Bourke, Stewart John Regan and Darcy Dugan.
In it he suggested that he knew the solutions to the Bogle-Chandler and Wanda Beach cases, although the suspect he named for the latter commenced legal action against Jenkings for the allegation.
Jenkings married Noreen Cecilia Simpson at St. Anne's Catholic Church, Bondi, New South Wales, on 30 March 1940.