3. In my opinion it was not wrong in principle for Mr. Cox to make a valuation on the basis that a hypothetical purchaser of the business would expect to receive back his capital intact at the end of the lease. No doubt it would have been possible to make a valuation on the assumption that none of the capital would be recovered, but on that assumption the hypothetical purchaser would obviously require a higher yield of income on the capital invested, and to increase the rate of capitalization to take account of that fact would of course tend to reduce the amount of the final valuation. In one way or another allowance had to be made in the valuation for the fact that the business had a limited life - that it was, in effect, a wasting asset. It is not without significance that the valuer called for the appellant, Mr. Adamson, made an allowance of this kind. His method was to capitalize the estimated maintainable annual profit. That gave him a figure of $500,000 from which he deducted $21,650 which he described in his valuation as follows: "Deduct present value of $500,000 in twenty years' time in recognition that quarry may then he worked out and no continuing business at that time. Multiplier .0433." The difference represented the value of the business as a going concern, although it was necessary to make certain adjustments which it is unnecessary to mention. Counsel for the respondent, in argument, placed some reliance on the fact that one of the valuers upon whose opinions the judge based his conclusions, Mr. Burgess, did not make any deduction to represent the amortization of the cost of the business. Nothing appears in the valuation of Mr. Burgess to show that he did take amortization into account, but he was asked in evidence whether he regarded the amortization of the lease as a cost of production, and replied: "I do. It should be written off over a reasonable period or (sic) not greater than the expected life of the quarry." There is nothing in the evidence that supports the view that it is inappropriate for Mr. Cox, in making his valuations, to amortize the cost, to the hypothetical purchaser, of the business which he was acquiring, and in that way to take account, as a prudent purchaser would do, of the fact that the business and the quarry had a limited life. (at p355)