Gwaith Dŵr Mwynol Hyam Fe'i sefydlwyd ar y safle hwn yn 1886, gyda'r Dug Beaufort ymhlith y cwsmeriaid. Yn niwedd y 19 ganrif, trosglwyddwyd y busnes i Charles Ballinger, a bu'n masnachu fel Gwaith Dŵr Mwynol Ballinger hyd ganol yr 20 ganrif.

English translation: "Hyam's Mineral Water Works Was established on this site in 1866, the Duke of Beaufort was among its customers. At the end of the 19th century the business was taken over by Charles Ballinger, and traded as Ballinger's Mineral Water Works until the mid 20th century. "

by Monmouth Civic Society in 2009

Colour: blue

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