The Delineator was a Butterick fashion magazine that ran from 1873 to 1937, reaching its peak influence in the early 20th century when it was among the most widely read women's publications in America. It covered fashion, home, and culture, and its covers evolved from decorative Victorian illustration into the bolder, flatter imagery of the Art Nouveau and early modernist periods. Period originals from this run are a direct record of how American commercial illustration changed across those decades.