In the early 18th century there was a demand for religious literature. In 1718 Isaac Carter established in Adpar (Trefhedyn) - at the back of the Old Salutation Inn - the first printing press set up in Wales. Two ballads were the first books printed in Wales. The author of one of these ballads was Alban Thomas, who became the Vicar of Blaenporth.
Carter did not stay long in Adpar. He took his printing press to Carmarthen in 1725 and remained there until 1734. A tablet can be seen at the original site, just opposite the bridge in Adpar.