Fern and Tree, Cong, Co. MayoThe bark furrows on this tree were so deep they had their own geography. Ridges and valleys running the full length of the trunk, like something geological rather than botanical. I was walking through the ancient woodland at Cong, Co. Mayo, on a flat, overcast morning. Perfect light for this kind of work. No harsh shadows, nothing blown out. Just soft, even illumination filtering down through the canopy. I'd been standing there a while before I