"Awful things happen on Sunday," she said with a shudder.
He felt a great pity rising in his heart for her, and strove to turn her thoughts in other directions.

Evidently there was a recent sorrow connected with the Sabbath.
"You are tired," said he, "and the horses are tired.

See! We ought to stop and rest.

The daylight has come, and nothing can hurt us.

Here is a good place, and sheltered.