Two of Long's characteristic circles.
The top one is titled, 'Cornish Slate Ellipse' from 2009. It's as it describes itself, an ellipse shape, rather than a pure circle. The slate is grey with very smooth tops, and people with me said the blocks looked painted. It had the look of a raft, with slats of wood lashed together, or field patterns, seen from high above.
The circle above, is titled, 'Blaenau Ffestiniog Circle' from 2011. This has lots of colours in the slate, which is sharp-edged, and spikey. Perpendicular, as opposed to horizontal. Colours included black, greys, browns, ochres. These slate pieces come from Wales. It echoes the mountains of Snowdonia, and the Welsh landscape.