The return of nature to abandoned places

In the Guardian's obituary for Welsh artist Bert Isaac, Monday, April 10, 2006:

There was one subject Isaac made his own: the return of nature to abandoned places. From overgrown quarries to tin-shacked moors, he was fascinated by the transformation back to wilderness. His energetic marks and vital colours echoed the redemption wrought by the cycle of nature. The environments he conjured seemed metaphysical - one felt that by pushing through his veils and thickets one might encounter an impossible new world or enter a higher consciousness.