Well if that's not proof of their existence, I don't know what is.

#17: "I've heard of people who claim to have traveled there to see them."

And, my daily NaNoWriMo update:
Day 18 cumulative goal: 30,006
My wordcount so far: 18,866
And now, if I want to hit 50k by the 30th, I'd have to average 2,595 words per day.
That last number keeps getting higher, which means I'm not going to make it unless I get hit by a surge of both creativity and free time.