An album issued at four-hundred vinyl copies, nearly impossible to find during more than twenty years or at incredibly high prices: here is what you can definitely call a collector ! "Nature" (1971) have been recorded by TETRAGON, a mainly instrumental German band. At first, it is an historical testimony about the first local Progressive rock generation. The musicians were receptive to all sorts of influences: classical music (First track is a fugue by BACH), jazz, blues, pop... So, the band's music is in the same vein as THE NICE's, but it is also a good moment of pure and refined music, with all the freshness of the Seventies. A 14 minutes live bonus-track, close to Brian AUGER OBLIVION EXPRESS' works, shows TETRAGON last musical evolution before its disbanding in 1973.