50 What is immediately evident, however, is that the task of construing the contract is not a straight-forward one. The contract is said to be constituted, not by a single contractual document, but by 'a monumental and forbidding aggregation of documents' (FE Cleary & Sons Pty Ltd v Buckland Building Group Pty Ltd (Unreported, NSWCA, 12 February 1976), cited in Cremean D, Whitton M & Sharkey F, Brooking on Building Contracts (5th ed, 2013)), consisting of some 28 emails and attachments (a total of 447 pages) passing between the parties in the course of negotiations over a period of some 12 months. The emails deal with a large range of issues and subject-matters relating to the work. Some also refer to conversations of unspecified content and a number deal with matters inconsistently or which had by 5 April 2012 been superseded, reflecting the changing circumstances over that period. Apart from the original construction programme, the latter include, for instance, the proposal by the respondent that the bank guarantees be 2.5% each of the contract price rather than 5%, a proposal apparently subsequently abandoned in circumstances that are not explained.