Thank you. After maybe a dozen searches, with Ancestry, FindMyPast, and MyHeritage, I somehow eventually came across him in Northumberland as a 'minister of religion (travelling)'. Born in Rhosllanerchrugog and living there all his life, and dying there, yet not at home in Poplar Avenue for the population register, he created a problem for me. I asked myself, Was he in the forces, either as a soldier or as a chaplain? His middle name (Rhosydd) seldom appears in any of the records, but the Register has him as J. Rhosydd Williams - and try finding the right John Williams - even the right one born in 1885 in Denbighshire! Still, it kept me busy for 2-3 days. Thanks for your help.