On the evening of February 27, 1861, she addressed eight hundred people in Concert Hall, Philadelphia. This was her first appearance before so large an assembly, and the first time she had the sole responsibility of entertaining an audience for an entire evening. She spoke two full hours extemporaneously, and the lecture was pronounced a success, not only by the press, but by the many notables and professional men present. Although it was considered a marvelous performance for a young girl, Miss Dickinson herself was mortified, as she said, with the length of her speech and its lack of point, order, and arrangement.

Soon after, she entered the United States Mint, to labor from seven o'clock in the morning to six at night. Although she was ever faithful to her duties and skillful in everything she undertook, soon becoming the most rapid adjuster in the Mint, her radical criticisms on the war and its leaders cost her the loss of the place. At a meeting just after the battle of Ball's Bluff, in summing up the record, after exonerating Stone and Baker, she said, "Future history will show that this battle was lost not through ignorance and incompetence, but through the treason of the commanding general, George B. McClellan, and time will vindicate the truth of my assertion." She was hissed all over the house, though some cried, "Go on!" "Go on!" She repeated this startling assertion three times, and each time was hissed.

When Gen. McClellan was running against Lincoln in 1864, after she had achieved a world-wide reputation, she was sent by the Republican Committee of Pennsylvania to this same town, to speak to the same people, in the same hall. In again summing up the incidents of the war, when she came to Ball's Bluff, she said, "I say now, as I said three years ago, history will record that this battle was lost, not through ignorance or incompetence, but through the treason of the commanding general, George B. McClellan." "And time has vindicated your assertion," was shouted all over the house.

It was the speech made in 1861, that cost her her place in the mint, for while laboring there daily with her hands, her mind was not inactive nor indifferent to the momentous events transpiring about her. She kept a close watch of the progress of the war, and the policy of the Republican leaders. When ex-Governor Pollock dismissed her, he admitted that his reason was that Westchester speech, for at that time McClellan was the idol of the nation.[32]

With remarkable prescience all through the war, and the period of reconstruction, Miss Dickinson took the advance position. Wendell Phillips used to say that "she was the young elephant sent forward to try the bridges to see if they were safe for older ones to cross." When wily politicians found that her criticisms were applauded by immense audiences, they gained courage to follow her lead. As popular thought was centering everywhere on national questions, Miss Dickinson thought less of the special wrongs of women and negroes and more of the causes of revolutions and the true basis of government; hence she spoke chiefly on the political aspects of the war, and thus made herself available in party politics at once.

In the intervals of public speaking, she made frequent visits to the Government hospitals, and became a most welcome guest among our soldiers. In long conversations with them, she learned their individual histories, experiences, hardships, and sufferings; the motives that prompted them to go into the army; what they saw there; what they thought of war in their hours of solitude, away from the camp and the battle-field. Thus she acquired an insight into the soldier's life and feelings, and from these narratives drew her materials for that deeply interesting lecture on hospital life, which she delivered in many parts of the country.

This lecture, given in Concord, New Hampshire, in the autumn of 1862, was the turning-point of her fortunes. In this speech she proved slavery to be the cause of the war, that its continuance would result in prolonged suffering to our soldiers, defeat to our armies, and the downfall of the Republic. She related many touching incidents of her experiences in hospital life, and drew such vivid pictures of the horrors of both war and slavery, that by her pathos and logic, she melted her audience to tears, and forced the most prejudiced minds to accept her conclusions.

It was on this occasion that the Secretary of the State Central Committee heard her for the first time. He remarked to a friend at the close of the lecture, "If we can get this girl to make that speech all through New Hampshire we can carry the Republican ticket in the coming election." Fully appreciating her magnetic power over an audience, he resolved at once, that if the State Committee refused to invite her, he should do so on his own responsibility. But through his influence she was invited by the Republican Committee, and on the first of March commenced her regular campaign speeches. During the four weeks before election she spoke twenty times, everywhere to crowded, enthusiastic audiences. Her march through the State was a succession of triumphs, and ended in a Republican victory.

The member in the first district having no faith that a woman could influence politics, sent word to the Secretary, "Don't send that damn woman down here to defeat my election." The Secretary replied, "We have work enough for her to do in other districts without interfering with you." But when the would-be honorable gentleman saw the furor she created, he changed his mind, and inundated the Secretary with letters to have her sent there. But the Secretary replied, "It is too late; the programme is arranged and published throughout the State; you would not have her when you could, and now you can not have her when you will."

It is pleasant to record that this man, who had the moral hardihood to send a profane adjective over the wires, with the name of this noble girl, lost his election. While all other districts went strongly Republican, his was lost by a large majority. When the news came that the Republicans had carried the State, due credit was awarded to Anna Dickinson. The Governor-elect made personal acknowledgment that her eloquent speeches had secured his election. She was serenaded, feasted, and feted, the recipient of many valuable presents, and eulogized by the press and the people.