SH5271 : Big name, little girl.I believe this particular sign is now in the industrial railway museum at Penrhyn Castle, Bangor
NH6071 [
http://en.wikipedia.org/wiki/Penrhyn_Castle_Railway_Museum ]. The translation as given to me reads 'The Church of St Mary by the hollow of white aspen, over the whirlpool and St Tysilio's church close to the red cave'.