[604] Navagero (1553), 37-39, estimates 7,166,000 ducats; Trevisano (1554), 149-150, says 8,196,000 ducats. Navagero seems to overestimate the mines (1,500,000 ducats) and the duties (1,200,000); Trevisano’s estimate of 2,000,000 from the animal tax seems unwarranted. Erizzo (1557), 130, claims to give an authentic statement of the sultan’s income and expenditure; the former he sets at 4,600,000 ducats and the latter at 3,600,000. A. Barbarigo (1558), 150, gives 7,740,000 ducats as income and 4,100,000 as expenditure. Donini, 190, says that after great efforts he knows most certainly that the income of the treasury for 1561 was 216,519,826 aspers, or 4,330,396 ducats and 26 soldi, and the expenditure 206,581,957 aspers, or 4,131,639 ducats and 7 soldi. He states that this income is less by 400,000 ducats than usual, because of the prohibition of wine. Erizzo does not include the tax on mines and salt works, and the income from Mesopotamia and the domain lands, in his list of sources of revenue; and Donini does not specify the sources. Bernardo, 347, says that the income in his time of service (1584-87) was 9,000,000 ducats, and that by 1592 it was 10,000,000. Knolles (ed. 1687, p. 982) estimates the sultan’s ordinary revenues about 1603 as 8,000,000. This does not, however, include confiscations, fines, tribute, customs, booty, etc., which Knolles (p. 983) believed to exceed the ordinary revenue. Hammer, _Staatsverwaltung_, 170, gives official figures for a hundred years later (1660): the income of the treasury then was 600,000,000 aspers, or 11,000,000 to 12,000,000 ducats at sixteenth-century valuations; capitation was nearly 2,000,000, land tax about as much, mines 1,000,000, etc. [605] The extensive notes given above show clearly that from 1433 to 1660 there was a progressive increase in the sultan’s income, as measured in aspers or ducats. Brosch (in _Cambridge Modern History_, iii. 130) accuses Suleiman of raising by taxation double the amount exacted by Mohammed II, and thus bringing undue pressure to bear. This statement fails to take account of the fact that Suleiman’s empire was about double that of Mohammed II’s in area, population, and wealth. Also it seems to have been the case that the value of gold and silver fell greatly after the discovery of the American mines (Day, 135). If these effects were felt promptly in the Levant, Suleiman’s income in the last years of his life may have had little more purchasing power than Mohammed II’s. Distributed over a wider area, the pressure of taxation in his time may easily have been lighter than it was three generations before.