The Southern Aurora was the silver train (which is now operating under the guise of the NSW Rail Transport Museum - Heritage Express -- check their web site) and the blue train was the Spirit of Progress. The Southern Aurora was a 1st Class Sleeper train, the Spirit of Progress was the 2nd class (or later Economy class) service. The Southern Aurora had the dining car with table service. The Spirit of Progress had the "bar" table as did the daylight service "Intercapital Daylight Express". The Aurora and Spirit were amalgamated as one train in the mid 1980's, when there were the 2 types of dining cars on the one service (blue and silver cars). John Armstrong