The first of the posts stood a foot in snow; at the second one the drift reached six or seven feet up; the next one looked only half as long as the first one, and you might have imagined, standing as it did on a sloping hillside, that it had intentionally been made so much shorter than the others; but at the bottom of the visible part the wind, in sweeping around the pole, had scooped out a funnel-shaped crater which seemed to open into the very earth like a sinkhole.
"Over Prairie Trails"
Frederick Philip Grove
He did not know why it was that he whistled while he filled the torpedo-shaped tank-indeed, Johnny did not even know that he whistled, nor that it was the first time since he had worked over his plane down at sinkhole Camp when all his dreams were bright, and bad luck had not knocked at his door.
"The Thunder Bird"
B. M. Bower
And they haven't seen him since last night, and-and you know what happened at sinkhole!"
"The Thunder Bird"
B. M. Bower