On 24 July 2009, ZB Bank Limited (the defendant) granted a revolving credit facility of up to $250,000 to Oxford Agro Chemicals (Pvt) Ltd (the company). Robert Morley (the plaintiff), a director and shareholder of the company, signed a guarantee on 5 August 2009 and passed a surety bond and mortgage bond over his Mt Pleasant property on 9 October 2009, securing the company's obligations. The total capital advanced was $223,903.15. The company defaulted on repayments. The defendant obtained judgment against the company. Following sales of assets and cash payments, $214,525 was paid to the defendant, but a balance remained outstanding. The plaintiff claimed he should be discharged from liability as surety on the basis that: (1) his liability under the surety bond was limited to $102,000; (2) the defendant had been paid more than this amount; and (3) the defendant varied the loan agreement by granting the company time to pay without his consent, which prejudiced him.