Hi Paula,
Well, I was hoping Alex would have had a profession that would make him stand out, since otherwise-- how are we to know which one he is? One would need to know where he was when Christina was conceived, which the censuses won't tell us. And his death cert is not going to say: "Father of Christina" unless, as seems highly unlikely, she were there to sign it. I have looked at Alex* Melvilles of all spellings in 1841 through 1881 and nothing jumps out. Most Alexander Melvilles seem to have had quite specialised occupations, so the pool of potential Farm Servants and Ploughmen is rather small. In England the Alexanders all seem quite posh-- not an Ag lab in the bunch. But here are the choices from Scotland (born 1800 +/- 20). What is odd is that it is not always clear that we have the same people each decade, so I have to believe that some were seriously misindexed:
1841
Woodside, Stonehouse, Lanarkshire
Alexander Melville, 25, born Scotland, Ag Lab
Thornton, Markinch, Fife
Alexr Melville, 35, born Fife, Ag Lab
Janet Melville, 35, born Fife
Coates, Rhynd, Perthshire
Janet Melville, 55, born Perthshire
Alexr Melville, 30, born Perthshire, Ag Lab
Janet Melville, 25, born Perthshire, A Widow
David Melville, 6, born Perthshire
Skelbo, Dornock, Sutherland
George Clark, 45, born Scotland, Ag Lab
Donald Gair, 30, born Scotland, Ag Lab
Andrew Grant, 25, born Sutherland, Ag Lab
Sopar McKay, 30, born Sutherland, Ag Lab
John McKinzie, 25, born Sutherland, Ag Lab
Alexr Melville, 25, born Sutherland, Ag Lab
Jane Ross, 25, born Scotland, F S
1851
West Calder, Midlothian
James Russell, 78, Head, born Old Monkland, Lanark, Pauper
Catherine Russell, 76, Wife, born Glasgow, Lanark
Alexander Russell, 28, Son, born W Calder, Midlothian, Journeyman Sawyer
James Finlay, 12, Grandson, born W Calder, Midlothian, Scholar
Alexander Melville, 36, Lodger, born W Calder, Midlothian, Ag Lab
Inchdairnie East Lodge, Kinglassie, Fife
Alexr Melville, 55, Head, born Dysart, Fife, Ag Lab
Janet Melville, 53, Wife born St Cuthberts, Edinburgh, Ag Lab Wife
1861
Blebo-Craigs,Kemback, Fife
Alexander B Melville, 42, Head, born Kemback, Fifeshire, Ag Labourer
Agnes Melville, 38, Wife, born Balmerino, Fifeshire
Jane Melville, 14, Daughter, born Kemback, Fifeshire, Out Door Worker
Robert Melville, 12, Son, born Kemback, Fifeshire, Scholar
James Melville, 10, Son, born Kemback, Fifeshire, Scholar
Margaret Melville, 8, Daughter, born Kemback, Fifeshire, Scholar
Alexander Melville, 4, Son, born Kemback, Fifeshire
Isabella Melville, 1, Daughter, born Kemback, Fifeshire
Inchdairnie East Lodge, Kinglassie, Fife
Alexr Melville, 64, Head, born Dysart, Fife, Ag Lab
Janet Melville, 63, Wife born Edinburgh, Midlothian
1871 Not a single Ag Lab, Farm Servant or Ploughman in the bunch!
1881
Blebo-Craigs, Kemback, Fife
Alex B Melville, 62, Head, born Kemback, Fifeshire, Labourer
Agnes Melville, 59, Wife, born Balmerino, Fifeshire
Margaret Melville, 27, Daughter, born Kemback, Fifeshire, General Servant
Alexr Melville, 22, Son, born Kemback, Fifeshire, Blacksmith
Catherine Melville, 18, Daughter, born Kemback, Fifeshire, Outdoor Worker
Agnes Melville, 4 Mo, Grandaughter, born Kemback, Fifeshire
Mary Stewart, 64, Boarder, born Leuchars, Fifeshire
Well, you have probably already looked at these, but I suddenly felt I needed to have a look and see if something jumped out
All the best,
Sarah