I think this is their entry for 1891:
Colin McIntyre 45 fisherman b. Morvern
George Davidson 32 boarder pedler b. Alva
Flora Davidson 32 boarder b. Morvern....I think this is Colin's sister
Address: 7 Combie St Back, Oban
This is Colin's last census before his death.
Monica
Added: Can't see a Davidson/McIntyre marriage.