'Three Forms' was made after an enforced break from carving caused by the birth of Barbara Hepworth's triplets by Ben Nicholson, two girls and a boy. on 3 October 1934. The artist later wrote: 'When I started carving again in November 1934, my work seemed to have changed direction, although the only fresh influences had been the arrival of the children. The work was more formal and all traces of naturalism had disappeared. and for some years I was absorbed in the relationships in space, in size and texture and weight, as well as in the tensions between the forms.' However, she also went on to make clear that these pure forms and their interrelationships have an ultimate human significance: 'This formality initiated the exploration with which I have been preoccupied continuously since then, and in which I hope to discover some absolute essence in sculptural terms giving the quality of human relationships'. In the light of this it may not be too fanciful to see a connection between Barbara Hepworth's 'Three Forms' and her triplets, especially since they share the pattern of two similar elements and one different.
Simon Wilson, Tate Gallery: An Illustrated Companion, Tate Gallery, London, revised edition 1991, p.177