In 'By Air', Davey has expanded the flat and regular geometric shape of the circle into an irregular three-dimensional form to explore the relationship between flatness and volume. The external surface is a thickly applied, industrial, spray-painted finish. This softens the edges and makes them look moulded rather than hand-made. Davey has described the contrast between the smooth external surface and the side facing the wall; 'you can actually see around the back. They are stitched together with any old bit of tubing or wiring and dozens of screws. It is very theatrical - like keeping the flood at bay'.