The Jan. 1960 Leon Davidson-Eisenhower Telegram

Straight from the Dwight D. Eisenhower Library in Kansas. Leon Davidson worked on the Manhattan Project and had an interest in UFO’s, and was “one of the team that developed the atomic bomb”.

He was an obviously very intelligent man, and suspected something was up (and indeed there was):

The original .PDF file provided by the library is on github.

Here’s the email reply from the library.

The source for this file is this catalog.