Note
"This type [of curtain] consisted o one piece of material drawn up from the sill by means of cords run through rings attached to the back of the curtain. When it was raised the fabric bunched at the top. Sometimes, depending on the fabric employed, swags or festoons were formed by the fabric between the cords, and this may account for their being described as festoon curtains also." Source: "Textiles in America 1650-1870", Florence M. Montgomery, A Winterthur Book, WW Norton & Co., New York, p.52.