Water’s words to stone here are alternately loving and savage, caresses turn violent, stroking becomes a slap. In wild weather it is a seething insistence of water. All that rock can do is hold to itself, edges rounded to ease the onslaught and survive the longest time under a constant assault that is both smooth and brutal. It’s an unequal contest in the end. The river can spread to mount its challenge: the rocks have no more movement in them. In dancing steps the water constantly changes direction, twisting, turning, preening round its static partner, forming shapes and ritual traces, like little tripping thoughts of happy times. As water tires of obstacle, there’s the trumpet of torrent and torment, a surge of force. Under an angry wind, white-topped waves rage down the valley. In gentler times, with little explosions of foam like a series of sneezes, it glides as clear as glass down a shelf of rock. The old war between rock and water is a lost cause for the remnants of another earth. The river will have its way, hard or easy.