How he could've got the Wright design when nobody in Europe have heard about the Wright experiments by the time Dumont flew his plane? Truth is, the Wright Brot

How he could've got the Wright design when nobody in Europe have heard about the Wright experiments by the time Dumont flew his plane? Truth is, the Wright Brothers were pretty secretive about their works and it wasn't until 1908 that people in Europe knew about them. Also, by this photo, that propeller seems to be working: https://en.m.wikipedia.org/wiki/File:Santos_-_Nov12_1906.jpg https://en.m.wikipedia.org/wiki/File:Santos_-_Nov12_1906.jpg