Gwahoddiad is a favourite Welsh hymn sung by male voice choirs throughout the land. The hymn has an international history, it was written in America by the Methodist minister Lewis Hartsough (1828-1919) but was later brought to Wales and translated into Welsh by Rev. John Roberts (Ieuan Gwyllt). Famously recorded by Cerys Matthews with a country and western flavour and titled Arglwydd Dyma Fi (Lord here I am) it was this version that inspired my arrangement.