Amazing thing I found via the Facebook tonight. Eugene Christophe on Cyclocross. There's an entire article complete with photos from January, 1921.
This is of particular interest because this dude's on a single speed. That's what I'm talking about.
Check out the article, or if you're skeptical or lazy, check out this one paragraph.
-- Here, I shall answer that you preach to the choir. For a long time I have known that the general public's interest in cyclocross will attract more audience than the fifty passers-by and curious who attend our starts and finishes, that amateurs will definitely wish to participate in this easy and quite variable sport. The public will begin following the competitors; it will realize that the race is engaging and eventful, they will have a good time; the time will fly past. It is impossible that it will not develop a taste for it; it will follow other races. And, as well as people who like like to sometimes leave the road for quieter and less dusty tracks, also the amateur cyclist, enticed by cyclocross, will no longer content himself with riding up and down the monotonous and trafficky road; he will ride through the thicket as easily as the pedestrian, he will learn to handle his bike and he will see that he can pass untroubled everywhere a pedestrian ventures. He will understand that a bike should not necessarily follow the road as a train follows the railway. His admiration and love for the bicycle as a mode of locomotion, can only increase following such experiments.