Royal Navy | Queensland | Royal Air Force | University of Queensland | Royal Dutch Shell | Royal Society | Royal Albert Hall | Royal Shakespeare Company | Royal Opera House | Royal Victorian Order | Royal Engineers | Royal Australian Navy | Royal National Theatre | Royal Canadian Navy | Royal Canadian Air Force | Royal Court Theatre | Royal Marines | automobile | Marylebone Cricket Club | Royal Commission | Royal Academy of Music | Lancashire County Cricket Club | Anne, Princess Royal | Royal Philharmonic Orchestra | Theatre Royal, Drury Lane | Sierra Club | Royal Flying Corps | Royal Canadian Mounted Police | Royal Australian Air Force | Royal Artillery |
Macrossan was a warden of the council of the University of Queensland, president of the Playground (and Recreation) Association of Queensland, president of the Twelfth Night Theatre Company, and also President of the Royal Automobile Club of Queensland.