I don't have any info on Margaret Morrison's parents: Samuel and Mercy but I do know that she had a brother named JOHN (1770-1836) who was married to SARAH BOATMAN (a daughter of Claudius Boatman Sr. and his wife, Esther). Sarah was one of 10 children. Sarah and John had the following children: Ann Maria ((1791-1871) (M) Alexander Hamilton (1792-1851) and they had: Robert, John M., Alexander, Jackson, Ann Amanda, Jane Hayes, Elizabeth, and
Mary P.), Elizabeth, Sarah ((1795-1881) (M) William Perine Blackwell (1790-1859) and they had: George M. (1821-1898) (M) Mary Ann (1823-1897), Enoch (1824-1904) (M) Mary Elizabeth Webster (1829-1894) and they had: William Plank (1851-1937), John M. (1828-1886) (M) Martha J. Walters (1832-1924), Mercy (1799-1899) (M) John Lundy and they had: John, Sarah, William M., Ann, Harriet, Charles, and Albert D., George (1800-1886) (M) Hannah Emich (1798-1892) and they had: (James H (1831-1904) (M) Mary Harrison (1843-1924) and they had: Zelma Undine (1867-1942) (M) William E Gamble (1861-1933), Sarah (1836-1913) (M) 1st John L. Pond (1838-1865), 2nd Peter Champaign (1846-1899), William (1832-1904) (M) Elizabeth Clark (1846-1921), Amanda (1825-1912) (M) George Patterson (1823-1904), and Ann (ELiz) 1827 (M) George Clark (1825)), Rachel (1801-1889) (M) 1st James Rowland 2nd William Lloyd and they had: (John, William H., Henry Clay, Richard A., James, and George M.), Margaret (1810-?) (M) Joshua Blackwell (son of John Blackwell and Sarah Cole) and they had: John Hay, George A., Spencer W., Edward S., and Christine, and Jane (1814-1882) (M) Henry Walters (1805-1881) and they had: Margaret (M) William Thomas, William Henry (1840-1928) (M) Clara Ann Blackwell (1850-1898), Mary Ann (M) Calvin West, Sarah (M) William Walter Love, Julia (M) Henry Campbell, and John (not married).
Sarah (Boatman) and John Morrison's children were: Ann Maria, Elizabeth, Sarah, Mercy, George, Rachel, Margaret, and Jane in case you get confused with the above info. The above info also contains info on the siblings' families.
I also have 2 Michael Campbells in my family tree. One was married to Elcy Tomb (daughter of Harriet Callahan and Benjamin Tomb). This Michael was born 1825 and died 1906.
The other Michael Campbell was born 1835 and died 1921 and was married to Catherine English whose mother was Priscilla Campbell (daughter of Rev. War Veteran Robert Campbell).
Priscilla was born 1809 and died after 1887. She was born in Truman Run and was married to James English Jr. (1805-1853). Priscilla and James had 8 children that I know of.
I hope this helps!