Thanks Millmoor. I agree it would be a huge leap to say they didn't come from Ireland but having trekked through some of the family lore so far, not a lot of it has been able to be proven. It's just that it wouldn't surprise me that the Ireland connection was something speculated way back when and found it's way into the fact side of the family history.
I have learned not to entirely trust the information on a census. Far too many variables are in the mix. It was not the job of the enumerator to verify information and depending on who was being asked for that information depended on what was given. For example, the owner of a boarding house could be answering all the enumerator's questions and may not have exact birth place information but assumed all his boarders were from the same area. Nor is age always correct as some people fudged their ages to hide an illegitimate child, an enormous age difference between spouses etc.
So what have I learned in the last 24 hours about Irish immigration to Scotland... that in all likelihood if they arrived in Scotland that they hailed from Ulster. Easier transportation and jobs in the time period were plentiful in Scotland.
The main route patterns for Irish immigration to Britain were:
Emigrants from Ulster settled in Scotland
Emigrants from Connacht and the central strip of Ireland travelled via Dublin to Liverpool
Emigrants from Munster and other southerly or western areas of Ireland sailed to South Wales, London or the English south coast.
That to find a relative in Ireland one needs to know their Province, county, parish and townland. The 1841 Scottish census only asked where born, subsequent census asked more detailed questions of birth places.
Protestant Irish faired better in Scotland Catholic Irish. That many Irish in Scotland ran lodging homes.
Records in Ireland are extremely patchy. Entire census records were destroyed to make room for newer ones.
There are no passenger lists from Ireland to Scotland, England or Wales.
Lots more to read about.