Copper manillas, made in Greenfield Valley, were exchanged for slaves in West Africa who were taken to North America to work on the plantations. Ships returned to Liverpool with a cargo of cotton ready to be spun in the mills of Greenfield Valley and Lancashire.
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Yn yr iaith y’u hysgrifennwyd gan yr awdur yn unig y bydd yr erthyglau blog yn ymddangos.
