'Dr. Gladstone' (1966). Dutch-language version.
Herbert Geldhof was an industrial artist, who worked in Africa for several years in the 1950s. He came back to Belgium in 1956 and began an association with the art agency of Georges Troisfontaines. He was present in the comic magazine Spirou between 1959 and 1971. He started out drawing several 'Belles Histoires de l'Oncle Paul' from scripts by Octave Joly.
In 1960 and 1961, Herbert was present in Bonux-Boy, the advertising mini-comic for Bonux washing powder, created by Benoît Gillain. In the early 1960s, he created two series. The first was 'Simba Lee', scripted by Jean-Michel Charlier and the second 'Diégo' with Charles Jadoul. Both series lasted for only two episodes, but in 1964, his third (and final) comics project started, in which he could use his knowledge of Africa: 'Docteur Gladstone'.
'Dr. Gladstone' (1968). Dutch-language version.
Together with his tutor Jijé and scriptwriter Jadoul, Herbert made the series 'Docteur Gladstone'. For this series about a doctor in Africa, Jijé drew the white characters and Herbert the black characters and the backgrounds. After two episodes, Jijé left the team, and Herbert continued the artwork of the series for another four episodes, until the series ended in 1971. He retired from comics in the early 1970s and focused on painting and sculpting. He passed away in Brussels in 2007.
'Diego - 'Les Assiégés de Matchu–Pitchu' (1963). Dutch-language version.