The original airstrips at Nadi were built by New Zealand from August 1939, being completed in March 1940, and were paid for by the British colonial authorities. They were extended by New Zealand from November 1941; the first runway was completed by January 1942 and the other two by April 1942. The work was requested by the United States of America for the South Pacific air ferry route and paid for as reverse Lend-Lease. In 1941 American engineer Leif J. Sverdrup discussed progress on the airfields with Walter Nash, then New Zealand Minister of Finance. Nash recalled Sverdrup saying that there was no formal agreement for payment for what was called Nandi Airport by America, so on the back of one of his cards Sverdrup drew a cross representing the airfield, wrote "£250,000" (pounds) and initialled it "L.J.S." The extension was actually estimated to cost £750,000 (pounds).