The revolutionary and Napoleonic wars mark an important stage in English finance. The national resources were strained to the utmost, and the "whip and spur" of taxation was used on all classes of the community. In the earlier years of the struggle the expedient of borrowing enabled the government to avoid the more oppressive forms of charge; but as time went on every possible expedient was brought into play. One class of taxes had been organized during peace--the "assessed taxes" on houses, carriages, servants; horses, plate, &c. These duties were raised by several steps of 10% each until, in 1798, their total charge was increased threefold (for richer persons four- or fivefold) under the plan of a "triple assessment." The comparative failure of this scheme (which did not bring in the estimated yield of £4,500,000) prepared the way for the most important development of the tax system--the introduction of the income-tax in 1798. Though a development of the triple assessment, the income-tax was also connected with the permanent settlement of the land tax as a redeemable charge. It is possible to trace the progress of direct taxation from the scutage of Norman days through "the tenth and fifteenth," the Tudor "subsidies," the Commonwealth "monthly assessments," and the 18th century land tax, to the income-tax as applied by Pitt, and, after an interval of disuse, revived by Peel (1842). The immediate yield of the income-tax was rather less than was expected (£6,000,000 out of £7,500,000); but by alteration of the mode of assessment from that of a general declaration to returns under the several schedules, the tax became, first at 5%, afterwards at 10%, the most valuable part of the revenue. In 1815 it contributed 22% of the total receipts (i.e. £14,600,000 out of £67,000,000). If employed at the beginning of the war, it would probably have obviated most of the financial difficulties of the government. The window tax, which continued all through the 18th century, had been supplemented in the American War by a tax on inhabited houses (one of Adam Smith's many suggestions), a group to which the assessment taxes were naturally joined. During the 18th century the probate duty had been gradually raised, and in 1780 the legacy duty was introduced; but these charges were moderate in character and did not affect land. Though the direct and quasi-direct taxes had been so largely increased, their growth was eclipsed by that of the excise and customs. With each succeeding year of war new articles for duties were detected and the rates of old taxes raised. The maxim, said to have guided the financiers of another country--"Wherever you see an object, tax it"--would fairly express the guiding policy of the English system of the early 19th century. Eatables, liquors, the materials of industry, manufactures, and the transactions of commerce had in nearly all their forms to pay toll. To take examples:--salt paid 15s. per bushel; sugar 30s. per cwt.; beer 10s.