LDS has the book, call #929.273 B561bc, also have it on microfilm FHL US/CAN Film [1440333 Item 1]. The full title is: "Our Black family in America: some of the descendants of William Black and Sarah Stevens. He, born in North Carolina in 1770, lived most of his life in Vermillion, Richland County, Ohio, and died there soon after 1850"
WHEW! THAT'S a title. Authors: Chester Allen Black (main) and Sarah Hancock Black (added author). Maybe you can order the microfilm through your local LDS library, or perhaps someone on this board has a copy and can do a lookup for you.