Was Preston even majority black? I know the town of Preston itself was. I saw a show about that town, the people there still have southern accents. (it was one of the destinations of the underground railroad)
Looks like it says 2/3rds are black... but the problem is they are under quota (only 19000 residents 2006) in the ridings. Yvonne Atwell (NDP 98-99) was the last black MLA
Argyle - 8000+
Clare - almost 9000
Richmond - 10000
... so these three "acadian" ridings for sure are going to change drastically, Preston less so