WHATEVER are we to make of this? For some months now Prince Joachim of Denmark has been quietly in our midst gaining, we are officially told, work experience with a Danish shipping company. Obviously, those letters back home telling the folks about the joys of life in the Orient must have been too tempting for his older brother, Crown Prince Frederick. For he's now dropped by to join Joachim. Into this scenario add Miss Denmark, Maria Hirse, who has also just returned to Hong Kong, having made her attractive presence felt around town when she was here some weeks back. Maria, we gather, has come to the sensible conclusion that life here is so much more attractive than back in the kingdom which will one day be governed by Frederick. All shaping up to a plot worthy of Hans Christian Andersen, don't you think?