this box is really interesting ;-)

[Evansville64]

I recognize some of these more technical drawings as the roller bearings for the wheels of locomotives

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Also, there is a certain Coast to Coast episode where a man explains how the ET would creep around his worshop late at night, and a beautiful female Annunaki person, tempted him to hand over some drawings of aviation parts. On the show, they determined the ETs were assisting an inventor from a still-developing 3rd density planet, develop an airplane. They would appear in a dream of his.
This leads me to believe maybe the Railroads were sprung up the same way..
Some time they ask random men for a DNA sample from ones reproductive system, too.