figures are pierced in a conventional manner, in which bent limbs separate from and rejoin the body. The later, more abstract figures are often penetrated by spaces directly through the body, by which means Moore explores and alternates concave and convex shapes. These more extreme piercings developed in parallel with Barbara Hepworth's sculptures. Hepworth first pierced a torso after misreading a review of one of Henry Moore's early shows. The plaster Reclining Figure: Festival (1951) in the Tate, is characteristic of Moore's later sculptures: an abstract female figure intercut with voids. As with much of the post-War work, there are several bronze casts of this sculpture. When Moore's niece asked why his sculptures had such simple titles, he replied, All art should have a certain mystery and should make demands on the spectator. Giving a sculpture or a drawing too explicit a title takes away part of that mystery so that the spectator moves on to the next object, making no effort to ponder the meaning of what he has just seen. Everyone thinks that he or she looks but they don't really, you know. Moore's early work is focused on direct carving, in which the form of the sculpture evolves as the artist repeatedly whittles away at the block. In the 1930s, Moore's transition into modernism paralleled that of Barbara Hepworth; the two exchanged new ideas with each other and several other artists then living in Hampstead. Moore made many preparatory sketches and drawings for each sculpture. Most of these sketchbooks have survived and provide insight into Moore's development. He placed great importance on drawing; in old age, when he had arthritis, he continued to draw. After the Second World War, Moore's bronzes took on their larger scale, which was particularly suited for public art commissions. As a matter of practicality, he largely abandoned direct carving, and took on several assistants to help produce the larger forms based on maquettes. By the end of the 1940s, he produced sculptures increasingly by modelling, working out the shape in clay or plaster before casting the final work in bronze using the lost wax technique. These maquettes often began as small forms shaped by Moore's hands—a process that gives his work an organic feeling. They are from the body. At his home in Much Hadham, Moore built up a collection of natural objects; skulls, driftwood, pebbles, rocks and shells, which he would