History of the Welsh Baptists is a foundational work tracing the origins, trials, and continuity of Baptist churches in Wales from the apostolic era through the eighteenth century. Compiled by Welsh minister and historian Joshua Thomas, with later editorial additions by B. Davies, the volume has long been recognized as a key source for understanding early Baptist perpetuity in Wales.

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Its importance was noted by leading Baptist historian David Benedict, who wrote in 1848:

“Rev. Joshua Thomas, a native of this country, in 1778 published a history of the Welsh Baptists from the year 63 to that time: although I have access to the book, yet as it is in the Welsh language I can make no use of it. About ten years since, a translation of a portion of this old history was published by the Rev. J. Davis, of Pennsylvania, which exhibits many interesting details of the Baptists in this ancient country.” — David Benedict, A General History of the Baptist Denomination (1848; repr. 1977), p. 343

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Long cited but seldom accessible, History of the Welsh Baptists offers invaluable insight into the early development of Baptist life and thought in Wales. For students of Baptist history, Welsh Christian history, and the broader backdrop of Reformation-era religious traditions, it remains an essential and illuminating resource.