There's currently an exhibition of Barbara Hepworth sculptures at the Tate Britain on Millbank. London which is apparently 'the first major Barbara Hepworth exhibition in London for almost 50 years'. In August 1998 whilst on holiday in St Ives we visited Barbara Hepworth's Trewyn Studios where she lived and worked from 1949 until her death in 1975. Here are some of the photographs I took on that visit.
'River Form'  on the left, 'Two Forms (Divided Circle)'  on the right, and behind it 'Sphere with Inner Form' 
'Four-Square Walk Through' 
'Stone Sculpture (Fugue II)' 
'Two Forms (Divided Circle)'  - and through the right-hand circle 'Coré' 
'Figure for Landscape' 
You can read here what Wikipedia has to say about Barbara Hepworth.