A Venn-diagram marked "Road to Wrights". Listed without connections: tethered flight by several individuals between c. 1000 - 1300; untethered flight by Montgolfier Bros. 1783; Untethered heavier than air flight by Caley 1853; Heavier than air and motor powered by Cughot 1769; Heavier than air, untethered flight, motor Wrights 1903.
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