Today I was on Ancestry, looking for something else, and thought to try 'Robert Blain' and 'Robert Blane' there - and lo and behold, there they were - in Greenock exactly where I'd expected, Robert and William, ages 17 and 12, born in Inch parish, Wigtownshire, nephews in the household of Hellen Blane from Stoneykirk who was now keeping a lodging house (I think she's Helen Cracken, widow of their elder brother John Maxwell Blain), and both boilermakers which is again expected.
One hopes that William, at 12, was an apprentice...
So, I now have more information about that family, including the birth of a son James to John Blain and Helen Cracken - the birth alas seems to be unregistered.
And a puzzle - wee James is apparently born in 1845 in 'Nickmoudse, Wigton'. OK, Wigtownshire, but what might Nickmoudse be? The Ancestry transcriber had a field day producing 'Stony Hrik' and 'Stoneykick'., but at least I knew what that was...
(I checked SP again to confirm that the index items were really missing, and have emailed them to let them know. If they send me the scan maybe I'll decipher it!)
Jenny