"Keep back!  Keep back!"

A boy came running towards me.

"It's a-movin'," he said to me as he passed; "a-screwin' and
a-screwin' out.  I don't like it.  I'm a-goin' 'ome, I am."

I went on to the crowd.  There were really, I should think, two or
three hundred people elbowing and jostling one another, the one or two
ladies there being by no means the least active.

"He's fallen in the pit!" cried some one.