Isn't that one at the end funny?
That one in a bolster-case tied at the top, and his hands sticking out of the slits at the sides, like fishes' fins.

I'm almost sure that it is Keith.

I could tell if I could only see his hands, but he has white stockings drawn over them." The figures began waving to and fro, faster and faster, until they were all drawn into a weird, uncanny dance, in which each one flapped or writhed or swayed back and forth as he pleased, in ghostly silence.

The movements of the ones in the bolster-cases were the most comical, and the little audience on the porch laughed until they could only gasp and hold their sides.
At a signal from the tall leader, the sheeted party suddenly divided, half of the masked faces grinning on one side of the steps, and half going to the other.

Then an auction began, one side being sold to the other.