Some authors are neglecting the hang gliding in the world that occurred following Otto Lilienthal up to 1950.
This topic thread invites notes that deal with hang gliding following Otto Lilienthal's final flight in a hang glider.
Briefly, for one key item: in the few years of 1907 to 1910, there was strong evidence of the cable-stayed triangle control frame (TCF) being used in more than one hang glider at hang gliding sporting events. Such made any later "invention" of the TCF mute. W. Simon was just one of more hang glider builder-pilots who used the triangle control frame in foot launched hang gliders before the end of year 1910 There are more than one reason why authors have missed seeing some of the actual history.
Even the late Volmer Jensen built and flew his hang glider in year 1940. VJ-11.
And the late Waldo Waterman in San Diego ... similarly: 1909. https://www.earlyaviators.com/ewaterma.htm
Collecting notes such as these are ripe matter for this topic thread.
Wrights powering did not "kill" hang gliding. No, hang gliding continued to have a history following Otto Lilienthal to 1950 and beyond. But this thread invites notes for the interim following Lilienthal's final flight and to January 1, 1950. Past that Jan. 1, 1950, is matter for another topic thread, perhaps.
Another high influencer, hang glider builder, hang glider pilot: Carl S. Bates (January 1, 1884 – August 27, 1956) Bate's hang glider plans for the world was published by a highly visited popular magazine. Carl Sterling Bates. Popular Mechanics Glider.
https://www.earlyaviators.com/ebates1.htm