The story concerns an attempt by fifth columnists to gain control of Australia's supplies of wolfram, a mineral used in the manufacture of munitions, involving a new wolfram field owned by Francis Jamieson (Marshall Crosby).
Marshall Crosby
Francis Jamieson
John Fernside
Mark Heinrich
George Lloyd
Monty Martin
Cecil Perry
Arthur Rogers
Patricia McDonald
Marion Jamieson
Raymond Longford
Peters
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