I was born and raised in Washington state. In 1967 or 68, I remember going with my parents to the old Coliseum in Spokane to hear Roger Paterson give his spiel on the famous film he took of a female Bigfoot.
Quite disappointing. He and others spoke for well over an hour, showed the film twice very quickly, and then it was "Thank you. Good night!"
Had a sour taste for that charlatan, since.
Since that famous film, others have claimed to find reference to Bigfoot sightings in old newspapers and publications. Trouble is, the original source is almost never cited. Almost always it's, "an old newspaper from 1893" or "The Wenatchee World" without a publication date and page.
And where do writers and others find these "sources?" In other Bigfoot books!
Too many writers, documentarians, enthusiasts, etc. forget that in the 19th century and up to the 1930s, it wasn't uncommon for newspapers -- especially those with small circulation -- to make up wild stories. Mark Twain did as a reporter in Nevada and California in the1860s and 1870s. He called them, "whoppers."
Wild stories not only lured readers to buy your newspaper, but they also got picked up by competing papers, who embellished them even more!
Yet, folks today believe these old papers, convinced that they are reliable. If you think the newspapers of today are suspect, you'd be aghast at what passed for truth and fairness 100 or more years ago.
And this is where we get vintage stories of Bigfoot, Ogopogo, mysterious airships long before there were aircraft (and even after), mermaids, UFOs that change course (so meteors are ruled out), green children, Devil footprints across the snow, and a host of other wild tales.
Yes, the inexplicable exists, but certainly not as often as the old newspapers report it. "Whoppers" were common then, and are perpetuated today.