26 Clause 4(b) of the contract is a common term used in agreements for the sale of land. The condition is that the purchaser will use all reasonable endeavours to obtain sufficient finance to enable completion of the contract. It is self-evident from the term that the purchaser is seeking the provision of that finance from a third person, usually an institution or professional lender. It is usual for the finance provider to require security for the loan, usually provided by mortgage. A mortgage attaches to the land and affords the mortgagee a legal and equitable interest. A prudent lender would require satisfaction that there existed a valid title to the land and that its value would be sufficient, in the event of default, to secure the loan. That satisfaction requires evaluation, usually provided by one with skill and expertise in the area of valuation which, in turn, might require inspection of the property. In order to provide business efficacy, a term implicit in the clause is that the vendor permit access for the purpose of valuation. The term is necessary to make the contract work and is so obvious that it goes without saying (Con-Stan Industries of Australia Pty Ltd v Norwich Winterthur Insurance (Australia) Ltd (supra), the court at 489). The respondent had prevented access to the property within the time permitted to the applicant to obtain finance.