Perhaps the horses also thought Bedlam had been let loose.

At sight of the terrifying apparition, they slackened up, snorted and reared backward.
"She is a brave girl," thought Tom Gray, as he leaped at the nearest rearing, plunging animal, while David seized the other.

Far down the road came the sound of a faint halloo.
"I'll pick up the others.

I suppose they are in a drift," said Reddy, as he drove off and in a few minutes returned carrying Miriam and her party.

Miriam herself looked white and frightened, although she pretended to treat the affair lightly.
"A rabbit scared the horses," was all she said.