Hi Eldon
I don't think it's the Trewern in south Montgomeryshire that I saw on the Gazeteer and mentioned yesterday.
I've since focused on the area where he lived and where he said he was born on the 1851.
My money is either on the Trewern near Gobowen or the Gwern near Llanfechain but, given the Gobowen one is so close to Whittington and it would be known locally, I'm opting for that one.
Gadget