Marietta Crichlow and Linda Crichlow White will present their book “Back There, Then: A Historical Genealogical Memoir” on Oct. 10 at 717 Queen Street starting at 1:30 p.m. The book discusses the importance of documenting Black family history during slavery. The event is free. For more information, visit backtherethen.com, call 703-746-1706 or e-mail backtherethen@aol.com.