Genealogist extraordinary, who wrote a number of genealogical and historical summaries on the Blackstone family. He also corresponded with many Blackstone families of many spellings. He kept hundreds of family group sheets which were donated by his wife Edna Blackstone to the New England Historical Genealogical Society (NEHGS) library in Boston after his death. The NEHGS is located at 101 Newbury St., Boston, MA 02116.