This was posted years ago, but it's interesting because I just added Walter, his parents David Walker and Mary to my tree. I am a direct descendent of George Bavaird and Mary Ann Walker, who were Walter's great-grandparents. My line came to the US (South Carolina) about 15 years before yours. I am also aware of a line that settled in Pennsylvania. My great great grandmother was a Bavaird, but I don't have that name. Coincidentally, I was raised in the Detroit area.