She did not know what it was, because at first she could scarcely distinguish it from the wind itself.

It was a curious sound--it seemed almost as if a child were crying somewhere.

Sometimes the wind sounded rather like a child crying, but presently Mistress Mary felt quite sure this sound was inside the house, not outside it.
It was far away, but it was inside.

She turned round and looked at Martha.
"Do you hear any one crying ?" she said.
Martha suddenly looked confused.
"No," she answered.

"It's th' wind.