We visited the grave of his great-great-grandmother, Margaret Beatty Lee Acheson, who is buried with her husband, John Acheson, on the banks of the Mouse River in Bottineau Co., North Dakota.
The B Acheson is probably William's brother Robert Edward Lee. Margaret was married to a William? Lee, who died on the voyage to Canada from Ireland along with some of their children. She had 2 surviving sons, William Henry and Robert when she married John Acheson and had 3 more children. I believe the Hill is probably her daughter Mary Acheson from her second marriage.