I am a Blackstock and was born in Bellochantuy in the Cottages. My father was Samuel "Sammy" Blackstock, a lobster fisherman, and my mother was Rose Dewar, the postmistress. They eloped and were married on my mother's 18th birthday, April 16th.
I have one brother, Jim Blackstock, who still lives in Campbeltown. As far as I can recall, my father had a brother, Peter, and I had a cousin who was also called Peter and they lived in and/or around Kilkenzie!
If this is helpful, just let me know, and I will see if I can dig up some more old stuff!
Annie Blackstock Dewar.