which had accrued to rent since the valuation was made. Of this the average price of produce would be some criterion: if that had risen, it would be certain that rent had increased, and (as already shown) even in a greater ratio than the rise of price. On this and other data, an approximate estimate might be made, how much value had been added to the land of the country by natural causes; and in laying on a general land-tax, which for fear of miscalculation should be considerably within the amount thus indicated, there would be an assurance of not touching any increase of income which might be the result of capital expended or industry exerted by the proprietor.
But though there could be no question as to the justice of taxing the increase of rent, if society had avowedly reserved the right, has not society waved that right by not exercising it? In England, for example, have not all who bought land for the last century or more, given value not only for the existing income, but for the prospects of increase, under an implied assurance of being only taxed in the same proportion with other incomes? This objection, in so far as valid, has a different degree of validity in different countries; depending on the degree of desuetude into which society has allowed a right to fall, which, as no one can doubt, it once fully possessed. In most countries of Europe, the right to take by taxation, as exigency might require, an indefinite portion of the rent of land, has never been allowed to slumber. In several parts of the Continent, the land-tax forms a large proportion of the public revenues, and has always been confessedly liable to be raised or lowered without reference to other taxes. In these countries no one can pretend to have become the owner of land on the faith of never being called upon to pay an increased land-tax. In England the land-tax has not varied since the early part of the last century. The last act of the legislature in relation to its amount, was to diminish it; and though the subsequent increase in the rental of the country has been immense, not
