Notes Upon Indigo is a book written by John Lord Hayes in 1878. The book is a detailed exploration of the history, production, and uses of indigo, a natural dye that has been used for centuries to color textiles. The author provides a comprehensive overview of the indigo plant, its cultivation, and the methods used to extract the dye from its leaves. He also discusses the various techniques used to dye fabrics with indigo, including resist dyeing...