Besides such duties as those of customs and excise above mentioned, there are several others which affect the price of goods more unequally and more indirectly. Of this kind are the duties which in French are called Peages, which in old Saxon times were called Duties of Passage, and which seem to have been originally established for the same purpose as our turnpike tolls, or the tolls upon our canals and navigable rivers, for the maintenance of the road or of the navigation. Those duties, when applied to such purposes, are most properly imposed according to the bulk or weight of the goods. As they were originally local and provincial duties, applicable to local and provincial purposes, the administration of them was in most cases entrusted to the particular town, parish, or lordship in which they were levied, such communities being in some way or other supposed to be accountable for the application. The sovereign, who is altogether unaccountable, has in many countries assumed to himself the administration of those duties, and though he has in most cases enhanced very much the duty, he has in many entirely neglected the application. If the turnpike tolls of Great Britain should ever become one of the resources of government, we may learn, by the example of many other nations, what would probably be the consequence. Such tolls are no doubt finally paid by the consumer; but the consumer is not taxed in proportion to his expense when he pays, not according to the value, but according to the bulk or weight of what he consumes. When such duties are imposed, not according to the bulk or weight, but according to the supposed value of the goods, they become properly a sort of inland customs or excises which obstruct very much the most important of all branches of commerce, the interior commerce of the country.

In some small states duties similar to those passage duties are imposed upon goods carried across the territory, either by land or by water, from one foreign country to another. These are in some countries called transit-duties. Some of the little Italian states which are situated upon the Po and the rivers which run into it derive some revenue from duties of this kind which are paid altogether by foreigners, and which, perhaps, are the only duties that one state can impose upon the subjects of another without obstructing in any respect the industry or commerce of its own. The most important transit-duty in the world is that levied by the King of Denmark upon all merchant ships which pass through the Sound.

Such taxes upon luxuries as the greater part of the duties of customs and excise, though they all fall indifferently upon every different species of revenue, and are paid finally, or without any retribution, by whoever consumes the commodities upon which they are imposed, yet they do not always fall equally or proportionably upon the revenue of every individual. As every man's humour regulates the degree of his consumption, every man contributes rather according to his humour than in proportion to his revenue; the profuse contribute more, the parsimonious less, than their proper proportion. During the minority of a man of great fortune he contributes commonly very little, by his consumption, towards the support of that state from whose protection he derives a great revenue. Those who live in another country contribute nothing, by their consumption, towards the support of the government of that country in which is situated the source of their revenue. If in this latter country there should be no land-tax, nor any considerable duty upon the transference either of movable or of immovable property, as is the case in Ireland, such absentees may derive a great revenue from the protection of a government to the support of which they do not contribute a single shilling. This inequality is likely to be greatest in a country of which the government is in some respects subordinate and dependent upon that of some other. The people who possess the most extensive property in the dependent will in this case generally choose to live in the governing country. Ireland is precisely in this situation, and we cannot, therefore, wonder that the proposal of a tax upon absentees should be so very popular in that country. It might, perhaps, be a little difficult to ascertain either what sort or what degree of absence would subject a man to be taxed as an absentee, or at what precise time the tax should either begin or end. If you except, however, this very peculiar situation, any inequality in the contribution of individuals which can arise from such taxes is much more than compensated by the very circumstance which occasions that inequality - the circumstance that every man's contribution is altogether voluntary, it being altogether in his power either to consume or not to consume the commodity taxed. Where such taxes, therefore, are properly assessed, and upon proper commodities, they are paid with less grumbling than any other. When they are advanced by the merchant or manufacturer, the consumer, who finally pays them, soon comes to confound them with the price of the commodities, and almost forgets that he pays any tax.