She observed rather anxiously that they were nearing the end of Main Street, where the houses were fewer and farther apart.
All at once her quarry stopped short and peered sharply about him through the gathering twilight.

Grace strolled on at a leisurely pace, though her heart beat violently.

Suppose instead of going on he were to turn and walk toward her.

Grace trembled a little.

She was drawing altogether too near to him to suit her.