Three of the finest quartets by the master of the genre, collected under the slightly bewildering title Haydn's Nature – which presumably refers to the three popular subtitles (Sunrise, the Frog and the Bird) but is not elucidated by the rambling sleevenote, which considers Haydn's relationship to green issues. The playing, by a leading young Dutch quartet, is scintillating: a glassy, vibrato-less Sunrise sets the tone, with a cheerfully mordant Frog and a chirruping Bird whose opening movement is almost too full of violent contrasts. Consistently intelligent playing wins out over purely beautiful tone, which here is just right.