Yes, I’m getting to that, reader Jane. The Paris-Brest pastry was “merch” in the popular parlance. Which is to say it was created as a commemorative item by an unknown pastry maker somewhere along the PBP course. Exactly who that pâtissier was has never been definitively established, though it’s popularly thought that Paris-Brest was created for the 1910 race by one Louis Durand, a resident of Maisons-Laffitte which is just northwest of Paris. It’s said that he created it to look like a bicycle wheel. Seems plausible enough to me.
Thanks to the ever-resourceful Jim Chevallier.