I am looking for the parents of Robert Blackstone. He was born in Baltimore MD around 1813 and was a "Free person of Color". Later, he and his wife, Mary Hebron, moved to Cincinnati, OH, around 1860, where he died, around 1864 while working on the "new" bridge. He and his family were of the Catholic faith. He was also a member of the "Black Brigade". Does anyone have any information on these MD Blackstones and his parents and other family.

Thank you,
Janet