60 The defendant's next argument is based on estoppel as per Walton Stores (Interstate) Ltd v Maher [1988] HCA 7; (1987) 164 CLR 387 at 425 et seq. The argument is that on 20 March 1996, the plaintiff issued a default notice in which it referred to various breaches, including the non-payment of rent, and specified a period of 14 days for the defendant to rectify the breaches by paying the total sum of $59,558.76 demanded. If the plaintiff was entitled to re-enter for non-payment of rent without demand, which the defendant denies, then the defendant says the plaintiff would, during that period of 14 days, be estopped from doing so because of the terms of the default notice. I agree with that. I think that is arguable. The defendant says that, by issuing that notice of default for various sums, for rates and variable outgoings, etcetera, which were arguably not then due by saying in the letter that the sum stated in the default notice had to be paid in full, and by denying Mr Michael Barter (Mr McPhee's partner) the opportunity of speaking directly with the plaintiff's officers, it represented to the defendant that it would re-enter unless the defendant paid the full sum of $59,558.76. The defendant understood there was no point in making a payment for any lesser sum. In Mr McPhee's third affidavit of 6 March 2002, he said that if he had known the plaintiff had intended to exercise a right of re-entry for non-payment of rent, irrespective of the validity of the default notice, he believed that he and Mr Barter would have been able to raise sufficient money to pay that rental before 4 April 1996. That outstanding rental, including that payable on 1 March 1996, amounted to approximately $30,000. I quote from pars 4 to 6 of Mr McPhee's affidavit: