This commissioned piece is based on the 56 pole woodhenge, that would have pre dated the later stone circle at stonehenge. The holes for these wooden poles were discovered in 1649 by John Aubrey. The woodhenge was a solar-luna calendar used to keep track of the solar and luna cycles and to calculate when eclipses would occur. This is a larch board with yew and bog oak pegs.

The Harmonograph is a mechanical drawing instrument that uses either 2 or 3 pendulums to create unique images of various harmonics. The harmonics are changed by raising or lowering the weights on the pendulums. To create an image the pendulums are set in motion and the pen lowered on to the paper. The invention of this amazing machine is attributed to Hugh Blackburn, a professor of mathematics at Glasgow University in around 1844.