Leen Spierenburg often worked together with Gerda Spierenburg, using pseudonyms like Jack. Spieger or Bing Reupers. In the 1940s, they produced some small comic books (so-called "beeldromans") in the Panter collection. He also illustrated several episodes in the 'Pietje Prik' series by Lea Smulders.
Some of the panels in his beeldromans strongly resembled Pieter Kuhn's 'Kapitein Rob'. You can read more about it on this webpage.