American Epistles tells history through the mail. Its raw material is letters, journals and diaries written by ordinary Americans. Host Susan reads them aloud and adds enough context to explain who wrote them and why. The documents carry most of the weight. Her commentary fills the gaps between them with census figures, legal background and the pressures that shaped a writer's choices. The show prefers long arcs to one-off stories. Its thirteen-part run with homesteader Elinore Rupert follows her letters from the Western frontier, and the host reckoned it covered about four years of Elinore's life over roughly six months of episodes. The letters are vivid on their own. In one, a stranger at a campfire asks whether she had taken him for an old devil, then recalls the dangerous early days of the country. In another, she helps a frightened young mother through a birth by firelight, and the baby is named Star after the morning star. The last part turns to her meeting with Mormons, including a letter in which a plural wife defends her husband and blames the law that made him cast her off. Susan is frank about the run, calling it educational, sometimes entertaining and at times challenging. The Chinese immigration series goes into harder material. One excerpt comes from an immigrant held in a wooden building after more than twenty days at sea, wishing only to land in San Francisco. Another is a first-person account of being put aboard a steamship to California by a stranger and crying all the way over. The series reads a contract that added months of service for every stretch of illness, quotes the Rev. Otis Gibson's testimony to the California Senate, and explains how the tongs ran the trade in women and girls. The frame is national, too. Figures trace Chinese immigration from 4,000 in 1850 to 35,000 in 1860, and an 1869 Vicksburg Times editorial shows how parts of the postwar South looked to Chinese labor after emancipation. Hostile voices are allowed to speak. The host reads an 1892 San Francisco Call article on the Tape family in full because she wanted listeners to hear the reporter's attitude toward a Chinese American family. That reporter admits he first took the story of a young Chinese woman devoted to photography for a fairy tale. Difficult material comes with a spoken warning at the top of an episode. Episode titles are quoted lines, such as 'Your pork and beans must be out of a can.' Large events like emigration and settlement come through at the scale of one person's letter.