Having obtained it, I think that, in the second place, it is desirable to consider the matter from the point of view of replacement or reinstatement less depreciation. That is to say, it is desirable to consider, so far as the evidence allows, what a comparable vessel would cost, and how much that cost should be depreciated on account of the actual age of the Myrtle Burgess, with which, in point of value, the hypothetical new ship must be compared. For this purpose the evidence already stated of the shipbuilder must be used, and some attempt must be made to apply a method of depreciation. In using replacement cost, less depreciation, as a guide to value, it is perhaps less necessary to take into account, as a reason for enhancing the value, the fact that the Myrtle Burgess when acquired was a "going concern." For the hypothesis is that the new ship is presented to the owner equipped and ready for use in the crayfishing trade. But the fact that he was carrying on a profitable trade cannot be neglected altogether, and should be allowed to influence the assessment, at least by raising a presumption in favour of higher rather than lower figures, where there is any doubt. But it is, I think, necessary to go further. For it must be borne in mind that the basis for considering reconstruction cost less depreciation as evidence of value is the supposition that the prospective and hypothetical purchaser would be governed, or at least affected by his ability to get what he needed by having it constructed or reconstructed. So too would the owner in considering what would be a fair price; for that represents the cost of replacement. But in present circumstances replacement by building is out of the question for at least three years according to the evidence. So where there is a profitable trade the immediate availability of an existing, though old, craft must operate to raise its price above the depreciated equivalent of replacement cost. The addition must be made to depend rather on judgment than on calculation, but it should be moderate and fixed only for the purpose of insuring adequacy in what, after all, is rather a mechanical and artificial form of reasoning or procedure in the assessment of a fair figure. The result again will be a test or indication of value with which to compare that first result arrived at.