Editing William Williams Pantycelyn (section)

===Hymns===
He wrote some of his work in English, but the great majority in his native Welsh. He published his first work in 1744: this was the first part of {{Lang|cy|Aleluia}}, a collection of hymns in Welsh. It was followed by further collections:
*1751: {{Lang|cy|Hosanna i Fab Dafydd}} (Hosannah to the Son of David). 
*1759: {{Lang|cy|Rhai hymnau a chaniadau duwiol}} (Some hymns and divine songs).
*1762: {{Lang|cy|Caniadau y rhai sydd ar y môr o wydr}} (The songs of those on the crystal sea).
*1763: {{Lang|cy|Ffarwel weledig, groesaw anweledig bethau}} (Farewell seen, and welcome unseen things).
*1771: ''Gloria in excelsis''.
*1772: ''[[O'er the Gloomy Hills of Darkness]]''
*1774: {{Lang|cy|Ychydig hymnau}} (A few hymns).
*1782: {{Lang|cy|Rhai hymnau newyddion}} (Some new hymns).

He also published two collections of English hymns:
*1759: ''Hosannah to the son of David''.
*1772: ''Gloria in excelsis''.

Undoubtedly his best known hymn is "{{Lang|cy|Arglwydd, arwain trwy'r anialwch|italic=no}}" (in English, "Lord, lead thou through the wilderness"). This was soon translated into English by [[Peter Williams (Welsh Methodist)|Peter Williams]]: "Guide Me, O Thou Great Jehovah" or "Guide Me, O Thou Great Redeemer". It is usually sung to the tune ''[[Cwm Rhondda]]'' by [[John Hughes (1873–1932)|John Hughes]].