The presence of the hill is also confirmed by this picture:
[Close-up view of damaged 1903 machine, rudder frame broken in landing, on ground at end of last flight] showing Flyer I 1903 landed, after its final flight on Dec. 17, 1903. The large size version of the image (TIFF 17.2 mb) also reveals the anachronistic look of the propellers. They simply did not exist in 1903. Propellers like that appeared at the end of 1907 and this is strong evidence the photo was not made in 1903.
Had the two brothers obtained a patent for their alleged 1903, 66% efficient propellers they would have had a great contribution immediately to increasing the speed of airships which lacked high performance aerial screws.