David Davies, also known as Dai'r Cantwr (David the singer) (c. 1812–1874), was a Welsh poet and lay-preacher. He was convicted and sentenced to transportation to Australia for his actions during the Rebecca Riots.
Davies was born in the parish of Llancarfan in about 1812 to John and Mary Davies, his father is believed to have been a tenant of the Duke of Beaufort. Although little of his early personal life is known, in later police records Davies is recorded as a "farm labourer, can plough", and at one time is thought to have worked at a quarry in Newcastle, Bridgend, also serving as a preacher to the local Wesleyians. He is later recorded as attending the Philadelphia Baptist Church in Cadoxton near Barry, one of the earliest Baptist chapels in the area, from which the important Baptist preacher, Christmas Evans is believed to have given sermons. Davies was nicknamed "Dai'r Cantwr", David the Singer, because he "taught them to sing at church".
On 13 May 1839, the first tollgate was attacked by rioters at Cilymaenllwyd, in an uprising by poor farmers, angry at what they believed were unjust taxations. By 26 May, the first phase of the Rebecca Riots ended with the destruction of the Water Street gate in Carmarthen. On 17 July of that year, the first instance is recorded of a group of rioters being led by a male ring leader dressed in women's clothing, widely accepted to be Thomas Rees. The dressing of the mob leaders as women was a symbolic gesture, in reference to a Biblical text, Genesis 24:60. At some point during the riots, until their end in late 1843, Davies became heavily involved, and like fellow rioter Shoni Sguborfawr, was paid to take a prominent role in the toll-gate attacks.
Although there are various theories of how the two men met, Davies and 'Shoni' became associated in several acts of incendiarism and gate-breaking. The riots were initially supported by the public, and very few rioters were arrested and convicted, but some of those taking part used the guise of 'Rebecca' to exact revenge on individuals and extort money; and Davies and 'Shoni' both undertook these actions. Eventually people turned on both men and on 24 September 1843, warrants were issued for their arrest. The following day Davies was arrested at the 'Plough and Harrow' a public house in Pum Heol near Llanelli. Shoni Sgunorfawr was arrested in London on 26 September. Davies was placed in custody in Carmarthen Goal to await sentence.