She was the author of The Diary of a Lady of Gettysburg, Pennsylvania from June 15 to July 15, 1863, which is a primary historical source for what happened during the battle and especially how it impacted the residents of the borough.
[3] Sarah Broadhead lived with her husband Joseph and their then four-year-old daughter Mary at the western end of Chambersburg Street, Gettysburg.
[4] The United States Sanitary Commission provided aid and supplies to the field hospital located at the Lutheran Seminary.
She donated 75 copies of the diary to the commission to be sold to raise funds at the Great Central Fair, held in Philadelphia in June 1864.
On June 6, 2015, the Linwood Historical Society dedicated a monument to Sarah Broadhead at her grave-site recognizing her contribution to the history of the Gettysburg Battle and her humanitarian work in its aftermath.