|The Chattanooga News - May 14, 1904|
Doing some more research on Diavolo I found this article from the same year, 1904.
|The Watertown Herald - August 13, 1904|
Sideshow World has a nice page on him. And Science Blogs has a detailed physics page on his act.
Diavolo might have been good, but he certainly wasn't The Flying Zacchinis.