The crucial problem under this section is to distinguish "direct" from other taxes. In its opinion in Pollock _v._ Farmers' Loan and Trust Co., we find the Court declaring: "It is apparent * * * that the distinction between direct and indirect taxation was well understood by the framers of the Constitution and those who adopted it."[1484] Against this confident dictum may be set the following brief excerpt from Madison's Notes on the Convention: "Mr. King asked what was the precise meaning of _direct_ taxation? No one answered."[1485] The first case to come before the Court on this issue was Hylton _v._ United States,[1486] which was decided early in 1796. Congress had levied, according to the rule of uniformity, a specific tax upon all carriages, for the conveyance of persons, which shall be kept by, or for any person, for his own use, or to be let out for hire, or for the conveying of passengers. In a fictitious statement of facts, it was stipulated that the carriages involved in the case were kept exclusively for the personal use of the owner and not for hire. The principal argument for the constitutionality of the measure was made by Hamilton, who treated it as an "excise tax,"[1487] while Madison both on the floors of Congress and in correspondence attacked it as "direct" and so void, inasmuch as it was levied without apportionment.[1488] The Court, taking the position that the direct tax clause constituted in practical operation an exception to the general taxing powers of Congress, held that no tax ought to be classified as "direct" which could not be conveniently apportioned, and on this basis sustained the tax on carriages as one on their "use" and therefore an "excise." Moreover, each of the judges advanced the opinion that the direct tax clause should be restricted to capitation taxes and taxes on land, or that at most, it might cover a general tax on the aggregate or mass of things which generally pervade all the States, especially if an assessment should intervene; while Justice Paterson, who had been a member of the Federal Convention, testified to his recollection that the principal purpose of the provision had been to allay the fear of the Southern States lest their Negroes and lands should be subjected to a specific tax.[1489] From the Hylton to the Pollock Case