Who was Pierre de Crawhez? (Upd. inventor of circuit racing?)

In a magazine dating from August 1909 we found several pictures of an expedition through Africa. There were no captions, except that one of the participants was Baron Pierre de Crawhez. We found a picture of him driving a Panhard, but that's about it. And we couldn't find anything about the Africa expedition, yet it must have been quite an experience, judging by the photos. Who can tell us more about Pierre de Crawhez and his expedition?
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