On 9 April 2002, the second appellant and first respondent concluded a written agreement for the sale of property (Remaining Extent of Portion 171 Wilgespruit 190 IQ) for R2,150,000. The agreement contained suspensive conditions in clause 13, including clause 13.2 which required rezoning and approval of a site development plan for residential development within twelve months. The agreement provided that if any suspensive condition was not timeously fulfilled, the entire agreement would automatically lapse and be of no force or effect. Clause 13.2 was not fulfilled within twelve months, and the agreement lapsed. On 8 August 2003, the second appellant's attorney offered to revive the lapsed agreement by letter (annexure B1), which the first respondent's attorney accepted on 20 August 2003 (annexure C1). The appellants alleged these letters constituted a written agreement to revive the lapsed sale with amendments to clause 13.2, extending the time for compliance to on or before transfer. The letters were signed by attorneys but not on the written authority of their clients as required by section 2(1) of the Alienation of Land Act 68 of 1981. The first respondent took exceptions to the particulars of claim on the ground that they disclosed no cause of action.