Your Great Grandfather MAY be relatively easy to trace in that it is very probabable that he came either from, or very close to, a village called Shotts. This is situated to the south of a line drawn between Glasgow and Edinburgh and is the main area in Scotland where coal was and still is mined. If you find Shotts on a map and look in an easterly direction you will see East Kilbride which is where I believe we all started from. Please see my other contributions to this message board. Please advise your first christian name (I'll be clever and guess at Robert as this is a "Calderwood" name) and any other information you have on your Great Grandfather. My mother was Calderwood from Glasgow who met my father who was from London in York during WW2. I was born in Norwich, Norfolk and still live here, but have relations living in East Kilbride and I have a lump of stone from the remains of our ancestral home, Calderwood Castle sitting in my fireplace.