The land in the present case was compulsorily acquired under the provisions of the Public Works Act. There are, therefore, sections of three different Acts that relate to the assessment of the compensation. They are s. 124 of the Public Works Act, ss. 5, 6 and 68 of the Valuation of Land Act and s. 9 of the Land and Valuation Court Act. Read together these sections require the court assessing the compensation to commence with the improved value placed upon the land by the Valuer-General. For that purpose the owner of the land or the resuming authority can apply to the Valuer-General to have the land valued as at the date of resumption. The improved and unimproved values of land defined by ss. 5 and 6 of the Valuation of Land Act are in the same terms as those defined by s. 3 of the Land Tax Assessment Act 1910-1952 Cth.. The meaning of the unimproved value of land in the latter Act was discussed by this Court in Federal Commissioner of Land Tax v. Duncan [1] . It was there held that in estimating the unimproved value of land the estimate must be made on the basis that the whole of the land is sold on the day on which the valuation is made but that the probability of the land bringing a higher price if sub-divided before sale than if sold in one block is an element to be taken into consideration in determining the value but is no more. The land there in question was a parcel of 6.572 acres of land and as Isaacs J. said: "The whole of the land is for the purpose of the section assumed to be disposed of in fee simple by the vendor. But it does not connote that the only potentiality to be considered is one purchaser who is able and willing to take the whole of the land uno ictu. That would reduce the range of competition and very materially affect the unimproved value of the land" [2] . He had just referred to cases in which it had been held that in compensation cases the test is the value of the land to the owner and had said: "I need not pursue those cases because, as far as the particular question raised here is concerned, the Act lays down the standard, and it is a mere question of interpreting that standard. Compensation cases may fall under the same rule, as I think they do, but it is an independent consideration" [2] . In compensation cases the test that has always been applied is that the owner must be compensated for the value of the land to him. That is the basis upon which compensation has always been assessed under s. 124 of the Public Works Act (1921). That basis is preserved by s. 9 of the Land and Valuation Court Act and it is also, in my opinion, preserved by s. 68 of the Valuation of Land Act because that section simply prescribes the valuation of the Valuer-General of the improved value of the land as the starting point. It then specifically provides that where land is resumed the compensation shall not exclude the rights to compensation which a claimant for compensation, apart from claims for forced sale or disturbance of business or for special value, would otherwise have. In Duncan's Case [1] , Griffith C.J. had said: "The hypothesis of a willing purchaser assumes, as I have shown, ability as well as willingness to buy. An hypothesis which assumes an indefinite number of purchasers able and willing amongst them to buy the whole of the land in separate parcels is quite a different thing, and is not the hypothesis made by the Act. A parcel of 6,000 acres of land is not substantially the same subject matter as (say) thirty parcels of land separated from one another by roads, and comprising together with the roads the original parcel. If, therefore, the owner can be treated for any purpose as a subdividing owner, he must be treated as one who has already gone to the expense of subdividing, and the value to him is no greater than it would be to a purchaser who had bought the land for the purpose of making such a subdivision, that is, not greater than the price such a purchaser would have given for it" [2] . He said: "The statute, in my opinion, contemplates a sale of the whole of the land on the day as of which the valuation is made" [3] . This is, I agree, the correct meaning of the unimproved (and improved) value of land occupied as a single parcel on the material date as defined in the Acts. It is the standard they lay down. It would be different if parts of the land were the subject of separate and independent enjoyment on that date: Deputy Federal Commissioner of Taxation v. Gold Estates of Australia (1903) Ltd. [4] . I agree with Macfarlan J. when he said in Payne v. Federal Commissioner of Land Tax [5] , that the words "such reasonable terms and conditions as a bona fide seller would require" do not refer to the question whether he should sell in sub-division or as a whole "but to the terms and conditions of sale in the ordinary sense". For the purpose of these statutory definitions of the improved and unimproved values of land, un-subdivided land must be regarded as having been sold in one parcel on the day the valuation is made but this is not the correct principle for determining compensation for compulsory acquisition. In that case the task of the Court is, as I have already said, to discover the value of the land to the dispossessed owner if put to its best use. This may easily be a higher sum than the value placed upon it under the special provisions of an Act for rating purposes. For I am quite unable to see why the owner should not be able to claim as compensation the net amount that land suitable for immediate sub-division would be estimated to produce for the owner if he prepared the land for sub-division and sold it in sub-division himself. In Minister for Public Works v. Thistlethwayte [1] , the Privy Council had occasion to consider the sections under discussion and said: "In the opinion of their Lordships, assuming ss. 5, 68 and 70 of the Valuation of Land Act 1916, standing alone might have resulted in some modification in the basis of assessment of compensation under the Public Works Act 1912, the effect of this proviso (in s. 9 of the Land and Valuation Court Act) is to restore that basis unimpaired" [2] . In The Commonwealth v. Arklay [3] this Court said in reference to s. 28 (1) (a) of the Lands Acquisition Act 1906-1936 Cth. which is in the same terms as s. 124 of the Public Works Act: "It is established that "value" in such a context means the value of the land to the owner. Where the amount for which a vendor may sell and a purchaser buy is not controlled the Court poses a hypothetical problem, the answer to which supplies this value. It is a familiar rule which in Australia was authoritatively formulated in Spencer's Case [4] . Shortly stated what is required is "an estimate of the price which would have been agreed upon in a voluntary bargain between a vendor and purchaser each willing to trade but neither of whom was so anxious to do so that he would overlook any ordinary business considerations": Commissioner of Succession Duties (S.A.) v. Executor Trustee & Agency Co. of South Australia Ltd. [5] . It is simply an analysis of what in all the relevant circumstances would be the price that a willing purchaser would have to pay a vendor willing but not anxious to sell in order to obtain the land. Where land has no special suitability for some business or activity carried on by the owner and has no added potential value if put to some better use, the value on a free market is usually its market value. The best evidence of this value is that of comparable sales of other land either before or after the date of acquisition but this evidence is often not available" [1] . In the Privy Council in Thistlethwayte's Case [2] their Lordships said: "It must not be forgotten that it is the value of the land to the owner that has to be ascertained, and that the willing seller and purchaser is merely a useful and conventional method of arriving at a basic figure to which must be added in appropriate cases further sums for disturbance, severance, special value to the owner and the like" [3] .