Contract signed 1948-11-23 by Smithsonian and Wright heirs

The contract shown in its entirity at the bottom of this page contains an unusual clause (also shown in red, immediately below). In it, the Smithsonian Museum cedes its right/duty to objectively investigate and represent aviation's origins. Instead, it contractually commits itself to always state the Wright Aeroplane flew first.

Besides the obvious surrender of a museum's core function, the contract's bloated legalese is "semantically challenged". It refers to "aircraft" (a word encompassing balloons and airships, many of which were motorized and flew before December 1903):