I believe that I have read far enough to understand that the Caolas on Tyree and the aforementioned district of Caolislate or Caolisraide are not the same. The parish register entries for the birth of Crawfords who emigrated from Caolasraide to Caradoc and Lobo Townships appear to support what the archivist wrote. I have located records for Dugald, Archibald, Catherine, Neil and Malcolm Crawford in Kilcalmonnel and Kilberry Parish. There is a record for a marriage between Archibald Fletcher and Margaret Crawford on January 13, 1838 in kilcalmonnel and Kilberry Parish. This is consistent with what the archivist wrote regarding Cara versus Carse.
One last piece of information which tends to support what the Archivist wrote, in the 1841 census Malcolm Crawford (50), Ann Crawford (50), Neil Crawford (12), Allan Crawford (9) and Malcolm Crawford (1) are all found living at N. Coulghaiter.
Jim.