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assayed, blanched or white

Latin arsas, ad arsuram, ad combustionem, ad ignem, albas, blancas, candidas, and variants.

Payment of some manorial valuations - notably on royal
manors - was accepted only in bullion which had been assayed and weighed, that is melted down to test for the presence of alloy and then weighed making allowance for the proportion of base metal. The process was sometimes called blanching and the resulting bullion as 'white'. Alternatively, an arbitrary allowance was made for the supposed debasement.

For more detail on the somewhat complex Domesday terminology, see Sally P.J. Harvey, 'Royal revenue and Domesday terminology', Economic History Review, second series, vol. 20 (1967), pages 221-28; and Sally P.J. Harvey, Domesday: Book of Judgement (2013), chapter 6 and appendix 1.
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