The source text is Update Proceedings, a symposium, held by Key Pharmaceuticals on their respiratory drug, "Theodur." One of three copies, all slightly different, were commissioned by Sackner. The other two were given as gifts to officers of the company. The book serves as a support onto which Broaddus placed his visual imagery with minimal attention directed to uncovering new verbal messages in the text. -- Source of annotation: Marvin or Ruth Sackner.