The Helen Dortch Longstreet papers include biographical materials, correspondence, speeches, manuscripts, newsclippings, and subject files, primarily documenting Longstreet's attempts to exonerate her husband from blame for the Confederacy's loss at the Battle of Gettysburg. The bulk of the collection is correspondence, including Sears Wilson Cabell, who served as treasurer of the Longstreet Memorial Association; her stepdaughter Lula Whelchel; Jessie P. Rothrock, North Carolina state chair of the Longstreet Memorial Association; and Joseph Rosensteel, park ranger at Gettysburg. Helen Dortch Longstreet's earlier papers are housed at the Georgia Historical Soceity in Savanah.