human
It beats me, said Bart at length.
gpt
We saw them go in and we followed them up and they weren't there. Sounds like black magic, doesn't it?
human
It surely does, agreed Frank, in great perplexity.
gpt
They didn't go through the back, they couldn't go through the sides, they couldn't go into the air, but they did go somewhere.
human
Down into the ground, suggested Bart jokingly.
gpt
That seems the only place left.
human
There's many a true word spoken in jest, he said.
gpt
Perhaps you've hit it, Bart. That's one place we haven't examined.
human
Small chance to examine that just now, said Bart.
gpt
You can see it's all covered with a glare of ice. There isn't a bit of ground showing.