Career
In the 1970s, he edited a magazine Union in Eurolatin, his own variation of Interlingua. In the pages of Union, he published articles and excerpts from users of all auxiliary languages and their periodicals. Visser argued that "interlinguists throughout the world should become friends," and his magazine is credited with improving understanding.
Willem was made famous for ramping his Land Rover series 3 over a some-what large ant-hill.