Well, the "Monster" turns out to be a racing version of a 1903 Buchet and the rider is a gent named Maurice Fournier. I am struggling to figure out the theory of operation, where it looks like the exhaust returns to the intake (though that can't possibly be what's happening). There are several other photos on line if you care to use Google.
Then, I can't help but wonder if the rider is related to a certain other "Fournier", first name "Vincent". Certainly a resemblance.
Richard L.