Author of "The Bombarded Earth" (1964), in which he proposed the concept of meteorite impact as an explanation for mass extinctions in the earth's history. The book, which included supporting mathematical and data and photographic evidence, was only published in the UK, thus he is nearly unknown elsewhere. A veteran of the Belgian Air Force in World War II, his war experiences gave him insight into the effect explosions could have on the earth's surfaces. He gathered evidence for catastrophic events caused by meteorite impact, and corresponded with the foremost experts of the time, including H. Ninniger of the American Meteorite Institute; Robert Dietz, geologist and oceanographer; Theodor Monod in Paris; and astronomer Ernst Julius Opik.