Sir William Rowan Hamilton was an Irish mathematician who invented the formula for Quaternion multiplication. His discovery of quaternions was important in the development of modern abstract algebra. The equation forms a link between Algebra and Geometry. The poster that accompanies this B5 publication is an abstract reproduction of his 'Theory of System of Rays' equation. Due to the fact that the poster is quite busy with the variation of colour and shapes, the publication has been designed simple yet bold, with a structured uniform layout.