Between 1955 and 1979 Henry Moore made nine column-like sculptures which he called 'upright motives'. He generated ideas for these sculptures by balancing forms on top of one another and by pressing lines of objects such as stones, bones, bolts and tools into clay. When enlarged, these experimanets resulted ins culptures with intriguing nooks and crannies, deep grooves and truncated forms. The final works are reminiscent of North-West American totem poles and prehistoric standing stones, or natrual forms like trees or stalagmites.