The early firings contained many stones.

When I was at art school, a lot of art education is about art being a means of self-expression, and as an 18-year-old I didn't know if I had a huge amount I wanted to express. It was a big moment when I decided I wanted to shift the emphasis or the intention of my art from something I disgorged myself upon and something that actually fed me or made me see the world or understand the world.

At its most successful, my 'touch' looks into the heart of nature; most days I don't even get close. These things are all part of a transient process that I cannot understand unless my touch is also transient - only in this way can the cycle remain unbroken and the process be complete.

As with all my work, whether it's a leaf on a rock or ice on a rock, I'm trying to get beneath the surface appearance of things. Working the surface of a stone is an attempt to understand the internal energy of the stone.

I can't edit the materials I work with. My remit is to work with nature as a whole.

Time gives growth, it gives continuity and it gives change. And in the case of some sculptures, time gives a patina to them.

My approach to photograph is kept simple, almost routine. All work, good and bad, is documented. I use standard film, a standard lens and no filters. Each work grows, strays, decays-integral parts of a cycle which the photograph shows at its height, marking the moment when the work is most alive. There is an intensity about a work at its peak that I hope is expresses in the image. Process and decay are implicit.