What was unusual about the conveyance used to pick up the children from the train depot?

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Originally Posted by Big Dawg

What was unusual about the conveyance used to pick up the children from the train depot?

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OK I'll bite. I don't see anything unusual about it. It's just a small pony cart pulled by a horse. What is it?

I think he's asking because he has to give the answer in essay form, as in homework. Unfortunately I don't know, I suppose to someone who gets a kick out of symbolism it must mean something.