In this series of Ramblings, Clare Balding is walking with people or in places recommended by listeners. Eryl Davies wrote to the programme suggesting a walk in the hills of North Wales with her father, Tegid. He lives near Blaenau Ffestiniog and loves to explore the area every day, usually alone with his dog Twm. Not that unusual except that Tegid has no sight and relies on his memory and his canine companion to find the way. He has always loved walking and when he can, likes to share his passion with the rest of the family. Today he's joined by Eryl and his sixteen year old grandson, Llewellyn. Their route can be found on OS Outdoor Leisure map 18 Producer: Lucy Lunt.