The following documents illustrate in the first place the sources of royal revenue other than (_a_) the direct rents accruing to the King as a great landlord, (_b_) the payments due to him as feudal overlord, and (_c_) the profits of justice and administration, Nos. 1 and 2 representing the ordinary forms of Parliamentary grants, and Nos. 3 to 6 the prerogative right of the Crown to payments for the privilege of commercial intercourse by way of prise or custom; and in the second place the continuous efforts of mediæval governments to secure a good and easy currency (Nos. 7 to 9), a problem which they failed to solve either by the direct method of forbidding the export and controlling the import of money, or by the indirect method of insisting on the exchange of goods for goods by alien merchants frequenting the realm. AUTHORITIES The principal modern writers dealing with the subject of this section are:--Dowell, _History of Taxation and Taxes in England_; Stubbs, _Constitutional History_; Hall, _Customs Revenue_; Shaw, _History of Currency_; Crump & Hughes, _English Currency_ (Economic Journal, V.). Contemporary authorities:--Wolowski, _Traité de Nicholas Oresme_. 1. FORM OF THE TAXATION OF A FIFTEENTH AND TENTH [_Fine Roll_, 10 _Edward_ III, _m._ 13], 1336. This is the form which the assessors and taxers of the fifteenth, granted to our lord the King in his Parliament holden at Westminster on the Monday next after Sunday in mid-Lent last past, in the tenth year of his reign, by the earls, barons, freemen and the commonalties of all the counties of the realm, and also of the tenth there granted to our said lord the King in all the cities, boroughs and the ancient demesnes of the King, of the same realm, from all their goods which they had on the day of the said grant, ought to observe, and thereby to assess, tax, collect and levy the same fifteenth and tenth in the counties of Northumberland, Cumberland and Westmoreland, to wit, that the chief taxers without delay cause to come before them from each city, borough and other town of the counties, within franchise and without, the more lawful and wealthier men of the same places in such number that therefrom the chief taxers may sufficiently choose four or six of each town, or more if need be, at their discretion, by whom the said taxation and that which pertains thereto to be done may best be done and accomplished; and when they shall have chosen such, then they shall cause them to swear on the Holy Gospels, to wit, those of each town by themselves, that those so sworn will lawfully and fully enquire what goods each man of the same towns had on the said day within house and without, wheresoever they be, without any favour, upon heavy forfeiture, and will lawfully tax all those goods, wheresoever they have come from then till now by sale or otherwise, according to the true value, save the things below excepted in this form, and will cause them to be listed