
Tonnage and Poundage were certain duties and taxes first levied in Edward II`s reign on every tun (cask) of imported wine, which came mostly from Spain and Portugal, and on every pound weight of merchandise exported or imported. Traditionally tonnage and poundage was granted by Parliament to the king for life up until the reign of Charles I. Tonn....
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customs duties granted since medieval times to the English crown by Parliament. Tonnage was a fixed subsidy on each tun (cask) of wine imported, and ... [1 related articles]
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http://www.britannica.com/eb/a-z/t/61

Excise duties granted in England 1371-1787 by Parliament to the crown on imports and exports of wine and other goods. They were imposed on every ton of imported wine and every pound of imported or...
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http://www.encyclo.co.uk/local/20688

Tonnage and poundage were custom duties formerly levied at the English ports. The duty was imposed on every tun of imported wine, and at twelve pence on every pound's worth of other goods passing in or out of the country. An early form of this was raised by agreement in 1347, and the proceeds went to the crown, nominally for purposes of defence. In...
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http://www.probertencyclopaedia.com/browse/JT.HTM
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