Compendium 2 "Spark to Larkspur" (Special Sets, Receivers & Larkspur) is in the course of preparation. The main sections in the final part of 'Spark to Larkspur' are 'Special Sets' divided into chapters Commercial, RAF and Admiralty sets adapted for Army use; ground to air sets; Special Purpose sets; local produced sets and private ventures. The 'Commonwealth sets' section deals with equipment manufactured and/or used in Australia, New Zealand and South Africa. 'Receivers' are covered in a separate section comprising chapters on: Numerical series; Commercial, RAF, Admiralty and Commonwealth receivers; Direction Finding receivers and Systems; Army Broadcast and Welfare receivers) The final section covers the 'Larkspur' range of sets, including Anti Aircraft Command sets.