108 On 16 October 2000, Mrs MacCarthy sent a facsimile to Mr Herman in which she made it very clear that the Curtain Bros Group had not purchased The Xanadu. Challenge alleges that between 16 August and that date the Group had by conduct, in effect by omission to deny a contract and other conduct, agreed to purchase the vessel or alternatively were estopped from denying that the Group had purchased the ship. The conduct of the Goldschlager party and the Curtain Bros Group in this period is, to say the least, unusual and surprising. The parties were not discussing the sale of a secondhand motor vehicle worth $5,000, but a ship said to be worth US$1.2M. Mr Goldschlager was being advised and assisted by his solicitor, Mr Herman. One may have thought that the negotiations would follow the familiar path of offer, negotiations, agreement in principle, draft written agreement, further discussion and negotiation, and eventual agreement of the terms with the execution of a formal document. This in fact was the course followed by the Goldschlager interests using Mr Herman when The Xanadu was purchased in 1994 and in relation to the proposed joint venture with East Timor. But that is not what occurred. After the 6 August conversation, Mr Herman prepared a number of drafts of the alleged agreement, for Mr Goldschlager's consideration, one of which provided for signature by the parties. However some ten days later Mr Herman sent off Heads of Agreement without any execution clause. The accompanying letter sought to bind the parties to the Heads of Agreement but identified a term not agreed to in the 6 August conversation. Furthermore, the Heads of Agreement contained a number of other clauses which were never the subject of discussion on 6 August, were not identified in the covering letter and amounted to an offer based on additional terms. The letter made the points that the agreement had been finalised over the telephone on 6 August and that the Heads of Agreement were intended to serve as the final document unless the parties elected to have a more detailed document brought into existence. A surprising aspect was that in the period between 16 August and 16 October 2000, and despite the fact that there were many discussions had between Messrs Goldschlager and Herman of the one part and Mr Curtain of the other part, neither party expressly queried the other whether they had a binding agreement, or sought to discuss or negotiate the additional terms. Mr Curtain for his part did not expressly inform the Goldschlager interests that there was no contract and on the other hand the Goldschlager interests did not expressly raise with Mr Curtain the question, "do we have an agreement?" Mr Herman did discuss some matters with Mr Curtain which related to the obligations by the Curtain Bros Group to do something or pay an account. But he never, prior to 18 October 2000, wrote a letter to Mr Curtain saying there was an agreement. In considering the evidence, one has the image of two heavyweights in a boxing ring, evenly matched, circling each other, sizing up the opposition but not landing a punch. Each man had his own agenda. Mr Curtain was interested, but was loathe to make any decision until he had seen the vessel. On the other hand, he was anxious to have the vessel brought to Port Moresby because it represented work for the dockyard. Mr Goldschlager was very anxious to sell The Xanadu. He and Mr Herman discussed tactics designed to put the Curtain Bros Group into a position where it could not deny it had agreed to purchase the vessel. Mr Goldschlager was not prepared to go down the conventional path of negotiating an agreement. He was not that confident that he would get an agreement. Hence, the strategy of sending a document and alleging there had been an agreement even though it was clear to both Mr Goldschlager and Mr Herman that the document contained terms which had not been discussed on 6 August 2000.