The main artists in the Studio Vandersteen in the 1960s and later were Karel Verschuere, Frank Sels, Eduard De Rop, Eugeen Goossens, Karel Biddeloo and Paul Geerts. Eduard De Rop joined the Studio in 1959, after Karel Boumans departed, and stayed for over thirty years. He worked mostly on minor series like "Jerom" and "Pats", but contributed to almost all series, including "Suske en Wiske". One of his main contributions was the early adventures of "De Rode Ridder". "De Rode Ridder" was in 1946 created by writer Leopold Vermeiren, and published in books since 1954, with illustrations by Karel Verschuere. The success led to the creation of a comics series as well, with as main contributors Verschuere, Eduard De Rop, and Vandersteen's son Bob. "De Rode Ridder" became the third main success story of Vandersteen, and is now the longest running series behind "Suske en Wiske". Karel Verschuere was replaced by Frank Sels in 1963.