“The pursuer has tried the said lands at all points shewing indication of freestone, but he has in every case been unable to turn out such a quantity as would repay his outlay even upon the most economical methods which can be used for the efficient working of minerals.”
“The contract of lease implies a subject let, and if it turn out, that no such thing exists as the parties intended to be the subject of agreement, the tenant cannot be bound to pay rent. Where the subject fails, (as where a house is burnt, where a farm is by a flood or a hurricane reduced to sterility,” which must mean absolute barrenness, “where a coal-mine is exhausted suddenly and unexpectedly,) the tenant's obligation to pay rent will be discharged.”
“The tack-duty is on account of the fruits,” and “sterility or vastation liberates in whole or part.”
“In other subjects besides rural possessions, the tack duty is remitted or abated, when by accident, without the tacksman's fault, the thing becomes unprofitable, or the use of it is interrupted.”
“sterility is not understood, where the increase satisfies the expense of the seed and labour.”
“The question of sterility even in agricultural leases is not free from difficulty when a subject becomes flooded or sanded over, and is therefore made quite different from what it was; that is a stronger case, but I doubt whether in agricultural leases, the repeal of the corn laws would have entitled a tenant to abandon his lease on the ground that it was not profitable. I also doubt whether every year is to be taken by itself in a continuing lease. Supposing an Egyptian in the time of Joseph had had a fourteen years' lease of land, and had got his first seven years of plenty with his barns crowded, and the years of scarcity had followed, I think it would be hard upon the landlord, that the tenant should get his full measure of the harvest during the first seven years and then pay no rent at all for the next seven.”
“The mineral lease being of a subject which may be untried, or the extent or quality of which is not fully known, is a speculation on the tenant's part. Provision is therefore necessary for enabling the tenant to be quit of the obligations, in case the trials shall fail, or the field not prove workable to profit; in other words, in case, after a fair and full endeavour on the tenant's part to turn the lease to good account, the speculation shall not succeed. With that view the lease generally allows breaks to the tenant at intervals of five years upon previous written notice of six or twelve months, and without any cause assigned.”
“the cause of loss must not be such as, although natural, can be deemed to have been in the contemplation of the lessee when he contracted. Increase of depth or accumulation of water in a mine does not give liberation or abatement to the lessee, although the addition to the expense of working should create positive loss.”
“Then as regards the representation that the freestone was capable of being worked to a profit by the tenant, such capability depends upon many contingencies, as, for example, the skill and capital of the tenant, the rate of wages, the state of the market, costs of transit, and many other elements of hazard. Such representations are, it is thought, a mere matter of opinion, which, even if erroneous, could not form a good ground for reducing the lease.”