Nicholas Roerich's 1927 UFO

Nicholas Roerich (photograph) "We saw, in a direction from north to south, something  big and shiny reflecting the sun, like a huge oval moving at great speed. Crossing our camp this thing changed in its direction from south to southwest. And we saw how it disappeared in the intense blue sky. We even had time to take our field glasses and saw quite distinctly an oval form with shiny surface, one side of which was brilliant from the sun."

Nicholas Roerich, 1927 (as cited in Jeffrey Kripal's Mutants and Mystics: Science Fiction, Superhero Comics, and the Paranormal).