 He was the commentary writer and narrator on almost 80 NFB documentaries, creating a characteristic narration style for NFB works of the period.He was described as "irreplaceable" in the field of documentary film commentary writing by Unit B colleague Colin Low.Ironically, Jackson is also credited with helping to "break" the NFB narration style he helped to create, on Low and producer Tom Daly's 1954 film, "Corral"