The quiet and calm of air travel allows for a different view, height and distance give a wider perspective. At 36,000 feet on the flight from Reykjavík the only suggestion of movement in this vast panorama over the north Lewis moor comes from the sea breaking on Tolsta beach. There is no distracting detail, no hectoring by plover, lapwing, skua or biting wind. The relentless waves thud and crumple silently on the shore below, line after line creating grain after grain of sand, they are the shuttle, the strands of seaweed the threads on a silent weaver’s loom.