The Abigail Clark Farley collection is made up of approximately 150 pages of essays, poetry, letters, and fiction that Farley wrote around the 1860s and 1870s. Some individual items contain more than one work, and she occasionally practiced decorated penmanship. The lengthiest item is a story entitled "Slander," a 52-page work (pages 5-8 are not present), and other essays or letters are as long as 4 pages. Though most items are attributed to Abigail Clark (later Abigail Farley), some are excerpts from other sources, such as "The Narative of Lewis Clark" [sic].
Around the time of the Civil War, Farley wrote essays expressing her opposition to slavery and her feelings about the war's high death toll. In many letters, poems, and essays, she commented on Seventh-day Adventism, various religious and moral topics, and friendship. Other essays and copied poems concern nature and the geography of Wisconsin. A group of elegiac poems are accompanied by genealogical notes. The collection includes a brief biographical note about Queen Victoria.
Abigail Farley's letters include an item written under a male pseudonym chastising a female acquaintance for unbecoming behavior (October 7, 1865) and a letter to Ellen G. White about her new husband's abusive behavior (March 28, 1871). One manuscript concerns a prophecy that came to Quaker minister Joseph Hoag. Small ink drawings of birds appear on one page of poems. One item documents partial terms for Abigail Clark's employment as a penmanship instructor. The collection includes recipes for lemon pies, rheumatic drops, several kinds of cake, and nerve ointment.