In answer by own query - the 'pound' used in measuring lead weights in the
late 13th / early 14th century, and defined in the documentation as weighing
25 shillings, was the English mercantile pound of 6750 troy grains. This
predecessor to the avoirdupois pound was derived from the Tower pound (350
g) of 12 ounces, i.e. 25 percent larger at 15 ounces of 450 grains.
Many thanks to those who responded. The answer to this particular question
was found in Zupko, Ronald Edward. British Weights & Measures, (Madison:
University of Wisconsin Press, 1977).
Peter
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Peter Claughton, Blaenpant Morfil, Rosebush, Clynderwen,
Pembrokeshire, Wales SA66 7RE.
Tel. 01437 532578; Fax. 01437 532921; Mobile 07831 427599
University of Exeter - School of Historical, Political and Sociological Studies
(Centre for South Western Historical Studies)
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Co-owner - mining-history e-mail discussion list.
See http://www.jiscmail.ac.uk/files/mining-history/ for details.
Mining History Pages - http://www.exeter.ac.uk/~pfclaugh/mhinf/
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