This series contains letters of sympathy and support written to Leo Frank. Although some of the letters were written to Frank by friends, the majority of the letters are from strangers across the United States. Many correspondents sent multiple letters to both Leo Frank and Lucille Frank (in Series II). The letters are arranged chronologically. Letters of note include a letter suggesting Frank hire a “trumpet medium” to call the spirit of Mary Phagan; several letters urging Frank’s lawyers to poison Jim Conley, another suspect in Mary Phagan's murder, so that he would confess; and letters urging Frank to convert to Christian Science.