Whirlegigg is the middle English word for a contraption that continuously spins. A great fascination with many inventors of the medieval period was to develop a perpetual motion machine constantly turning and giving off energy. This idea is particularly apt for this piece. A simple ternary structure gives ample opportunity for both boisterous and reflective material with gyrating accompanimental figures never far away. The machine almost stops near the end, but finally musters one last burst of excitement and energy to bring the work to its close.