I'm looking for information on the Blackall family of Rochester, 1860s to roughly 1950s. Burton F. Blackall m. to Sarah Blackall. Children Florence, Gertrude, Minnie (later Bishop) and Robert. Family were good friends with Frederick Douglass and his family (both first and second wives) and with Susan B. Anthony. Would love to find descendants of these people as I have letters written between the Blackalls and their more famous friends.