rattler on Family Tree Circles

I know he lived with Elizabeth ? and his son William was born 1935 in the small market town of Ashburton but can not find where they married.

His father Richard MARTIN lived with Maria his wife and family at Tavistock cottages in the Roborough district of Plymouth where he made a living as a tanner.The family were all baptised in the Presbaterian chapel at Batter street plymouth.