Similarly, according to Darroch, the character of Jack Calcott – who is the Somers' neighbour in Sydney and introduces Richard Somers to Cooley – may have been based on a controversial Australian military figure, Major John Scott, who was both an associate of Rosenthal and an Old Guard official. Another central character is Willie Struthers, a left-wing activist reputed to have been based partly on Willem Siebenhaar, who made Lawrence's acquaintance in Western Australia. James Sharpe is said to have been based on the music critic and composer Cecil Gray.