Hi all and thanks for the pointer to Ancestry though it took a hiccup to get through on the right page. Anyway, the search machine, while giving wondrous (getting near to Christmas?) spellings, does give lists of "place of birth" which makes all the difference with a frequent name in Glasgow, but born somewhere exotic.(Boston USA)
And yes I found gr.grandfather now after much expensive searching on SP. His father is not evident, but two other brothers............

To conclude matters, I think a print out from SP is the only way to go, having first found the culprit, guilty as sin hiding away, but did he know it, easily enough found on Ancestry.
One slight deviation from the norm, is that the three brothers get a new mother, same surname, but the old one is still alive and died thirty years later. No hubby, but he was a plasterer journeyman, and could be anywhere, Scotland, or USA.
Is a tree ever "complete"?.........
Guid hunting,
Thrall