Bolus's first abstract sculptures date from the early 1960s. '11th Sculpture' demonstrates his concern with making the constructed nature of the work as explicit as possible. It also shows his concern with flatness. Several ground based elements are connected with other fragmented forms which rise into the air. A sense of continuity linking these different elements is created by the line which runs through the centre of the sculpture. The work thus embodies a physical sensation: that of resisting gravity and rising from the ground. But it does so directly, in purely abstract terms, and without the use of illusion.