Thanks, Gareth, for that information. I was going on various on-line sources, such as the Polish Music Centre, and when you see dates and opus numbers allocated to works then an innocent chap such as I makes the natural assumption that at least scores are available and the job is to persuade someone to perform them. Life, unfortunately, isn't as simple as that!
The sentiment has been expressed on the site before, but I find it very distressing to think of a major work such as a symphony as being forever unsung. Just try the mental experiment of putting yourself in the composer's shoes now knowing that your work will never, ever, be performed, let alone heard by others. The thought is gruesome.
So, alas, Zelenski 1 and 2 are things we shall never hear - they promised much. Unless of course some benevolent angelic orchestra plays them in heaven. But perhaps not - only harps get strummed in that dull place. Maybe I'd much prefer hell - heigh, ho, lots of Liszt, and those thoroughly mad but rather good late symphonies of Tischenko. For the musically inclined, hell appears far preferable to heaven, eh?. (Forgive my frivolity!)
I haven't checked, but presumably much of the Zelenski chamber music is up for grabs by any enterprising chamber group? As I remarked above the Piano Quartet is certainly worth a go.
Peter