A series of fifteen photographs made over five years at the edge of the sea on Portobello beach on the eastern outskirts of Edinburgh. It's a place that has been part of David Williams’ life for four decades and a short walk from the house where he has made his home for the past twenty years.

The stillness of the title is more immediately apparent than the occurrence.

Any photograph, by definition, presents us with a still image, although not necessarily with an image of stillness. Here, long exposures suspend the moment in a stasis of suffused light, slowing life almost to a stop as the haar seeps slowly off the Forth, to make images which exist in a liminal, almost dreamlike, space where water, sky and mist smudge the edges of tangible actuality.

The occurrence is implied rather than witnessed. And yet it's there, as part of the inevitable if imperceptible turn of life's wheel.

The duality pointed to in the series’ title, is made explicit by the figure of a pregnant woman in the first image – even in moments of such stillness, it seems to say, the journey continues - her pregnancy a promise of the future.

Williams has described his interest in ‘the resolution and integration of opposites’, but perhaps the co-existence of opposites is a truer description. It is not stillness versus occurrence, but stillness and occurrence, and even at its stillest point, life ticks on.