I have a copy of "Aerodonetics" by F. W. Lanchester [1909]. "Constituting the second volume of a complete work on aerial flight." It puts forth various theories about flight, but never mentions the Wrights. It does mention Lilienthal.
The following footnote appears in the Preface. "There is a false impression - one that is far too prevalent - that the essence of flight consists of flapping wings. Nothing is further from the truth."
SC