translate English to French: There was a sense at the time that the wonderful tranquillity and peace of the moment was a result of many forces held in perfect balance: day/night, sun/moon, sea/sky, birds/planes: much of the material is of birdsong and other sounds in the forest which borders the seashore at Newborough, and since the constant presence of jets overhead was not only inescapable, but also highly characteristic of the place, it seemed natural that they became a part of the material of the piece.
Se dégageait alors la sensation que la formidable tranquillité et la paix du moment résultaient de plusieurs forces maintenues en parfait équilibre: jour/nuit, soleil/lune, oiseaux/avions: la plupart du matériau consiste en chants d’oiseaux et autres bruits de la forêt qui borde le littoral de Newborough; comme la présence des jets est non seulement inéluctable, mais aussi fortement caractéristique de l’endroit, il semblait naturel qu’ils fassent partie de la pièce.