Edward Ritch died in 1874 at Mount, Rackwick, aged 77, his parents were Edward Ritch and Jessie Thomson.( Scotlands People ) On the 1841 census at Greenhill there is Andrew Thomson aged 70 living on independent means, so could be uncle ? There is a good book " Hoy The Dark Enchanted Isle" you might find interesting, it mentions some of the Ritch family and their history, ( The covenanters Memorial ) Deerness. The Ritch families in Orkney are supposedly descended from survivors of the sinking of " The Crown " off Deerness, a vessel which was chartered to take 250 covenanters to America as slaves, 50 or so survived, two of which were called Ritchie, in order to throw their enemies off the scent they shortened their name to Ritch.
Hope you get the chance to go to Rackwick when you visit Orkney, its a beautiful atmospheric place, remember to visit Betty Corrigalls grave en-route, oops I see you have already found your Edwards parents, hopefully the other info will be useful
