I. THE customs; or the duties, toll, tribute, or tariff, payable upon merchandize exported and imported. The considerations upon which this revenue (or the more antient part of it, which arose only from exports) was invested in the king, were said to be two[r]; 1. Because he gave the subject leave to depart the kingdom, and to carry his goods along with him. 2. Because the king was bound of common right to maintain and keep up the ports and havens, and to protect the merchant from pirates. Some have imagined they are called with us customs, because they were the inheritance of the king by immemorial usage and the common law, and not granted him by any statute[s]: but sir Edward Coke hath clearly shewn[t], that the king's first claim to them was by grant of parliament 3 Edw. I. though the record thereof is not now extant. And indeed this is in express words confessed by statute 25 Edw. I. c. 7. wherein the king promises to take no customs from merchants, without the common assent of the realm, "saving to us and our heirs, the customs on wools, skins, and leather, formerly granted to us by the commonalty aforesaid." These were formerly called the hereditary customs of the crown; and were due on the exportation only of the said three commodities, and of none other: which were stiled the _staple_ commodities of the kingdom, because they were obliged to be brought to those ports where the king's staple was established, in order to be there first rated, and then exported[u]. They were denominated in the barbarous Latin of our antient records, _custuma_[w]; not _consuetudines_, which is the language of our law whenever it means merely usages. The duties on wool, sheep-skins, or woolfells, and leather, exported, were called _custuma antiqua sive magna_; and were payable by every merchant, as well native as stranger; with this difference, that merchant-strangers paid an additional toll, _viz._ half as much again as was paid by natives. The _custuma parva et nova_ were an impost of 3_d._ in the pound, due from merchant-strangers only, for all commodities as well imported as exported; which was usually called the alien's duty, and was first granted in 31 Edw. I[x]. But these antient hereditary customs, especially those on wool and woolfells, came to be of little account when the nation became sensible of the advantages of a home manufacture, and prohibited the exportation of wool by statute 11 Edw. III. c. 1. [Footnote r: Dyer. 165.] [Footnote s: Dyer. 43. _pl._ 24.] [Footnote t: 2 Inst. 58, 59.] [Footnote u: Dav. 9.] [Footnote w: This appellation seems to be derived from the French word _coustum_, or _coutum_, which signifies toll or tribute, and owes it's own etymology to the word _coust_, which signifies price, charge, or, as we have adopted it in English, _cost_.] [Footnote x: 4 Inst. 29.]