“Guide me, O thou Great Jehovah” was written by William Williams in 1745. (CWM RHONDDA in Welsh) It has been used for worship in congregations around the globe and across denominational lines. Williams beautifully uses imagery from the Old Testament book of Exodus to conjure a theme of God’s guidance through struggle. William Williams, called the “Watts of Wales,” was born in 1717, at Cefn-y-coed, near Llandovery, Carmarthenshire. He originally studied medicine, but abandoned it for theology. He was ordained Deacon in the Church of England, but was refused Priest’s Orders, and subsequently attached himself to the Calvinistic Methodists. For half a century he travelled in Wales, preaching the Gospel. He died in 1791. Williams composed his hymns chiefly in the Welsh language; they are still largely used by various religious bodies in the principality. Many of his hymns have appeared in English, and have been collected and published by Sedgwick. His two principal poetical works are “Hosannah to the Son of David,” and “Gloria in Excelsis.” Translator: Peter Williams. Peter Williams (b. Llansadurnin, Carmarthanshire, Wales, 1722; d. Llandyfeilog, Wales, 1796) was converted to Christianity by the preaching of George Whitefield and was ordained in the Church of England in 1744. His evangelical convictions soon made him suspect, however, and he left the state church to join the Calvinist Methodists in 1746. He served as an itinerant preacher for many years and was a primary figure in the Welsh revival of the eighteenth century. After being expelled by the Methodists in 1791 on a charge of heresy, he ministered in his own chapel during the last years of his life. He published the first Welsh Bible commentary (1767-1770) and a Bible concordance (1773); he was also one of the annotators for John Canne’s Welsh