On 9 May 2001, the first appellant, as trustee of the JJ Boerdery Trust, signed an advance contract for the sale of 900 tons of yellow maize at R785 per ton to a close corporation, with delivery to occur between 1 June 2002 and 31 July 2002. The contract was later ceded to the respondent on 25 January 2002. By March 2002, the price of maize had risen to R1,239 per ton (having peaked at R1,640 per ton). The appellants were two trustees of the trust, and the trust deed required unanimous decisions where only two trustees existed. The first appellant signed the contract without the authorization or approval of the second appellant (his co-trustee). When the respondent sought to enforce the contract, the appellants contended it was null and void because the second appellant had not authorized or participated in concluding the agreement. The respondent argued that it was entitled to assume the first appellant had authority to conclude the contract, relying on the Turquand rule and clause 23.4 of the trust deed, which allowed trustees to empower one of their number to sign documents for official purposes.