Mary Louise in the Country by L. Frank Baum

Nan's presence at Cragg's Crossing rendered Josie O'Gorman uneasy. She had the Cragg case so well in hand, now, and the evidence in her possession was so positively incriminating, in her judgment, that she did not like to be balked by a clever female detective from her father's own office. She had little doubt but Nan would do all in her power to save old Hezekiah Cragg from the penalty of his misdeeds, and her greatest fear was that he might utterly disappear before O'Gorman sent her assistance.

With this fear growing in her mind, on Monday she determined to send another telegram to her father, urging haste, so she obtained permission from the Colonel to have Uncle Eben drive her and Mary Louise to the city, there being no telegraph office at Chargrove Station. But she timed the trip when no trains would stop at Chargrove during her absence and at the telegraph office she sent an imperative message to John O'Gorman at Washington demanding instant help. Since all counterfeiting cases belonged distinctly to the Secret Service Department she had little doubt her father would respond as soon as the affairs at the office would permit him to do so. But the delay was exasperating, nevertheless. Indeed, Josie was so sure that the crisis of her case was imminent that she determined to watch old Cragg's house every night until his arrest could be made. If he attempted to escape she would arrest him herself, with the aid of the little revolver she carried in her dress pocket.