‘Correspondence with the Jacob Blaustein Foundation‘, collection owner: Dame Barbara Hepworth, 24 September 1963–18 January 1965 – Tate Archive | Tate https://www.tate.org.uk/art/archive/tga-20132-2-1-2/hepworth-correspondence-with-the-jacob-blaustein-foundation
The Jacob Blaustein Foundation paid for the memorial, ‚Single form., UN HQ, New York, USA. The correspondence discusses the cost of the project.
regarding the commission ‘Single Form’ for the United Nations