Watson spent his final years revising two books, one on the practice of lighting design and also the history. Watson lamented that his publishers had asked him to separate the history books into smaller projects, which he agreed to do, then ended agreements with several publishers. Watson worried on more than one occasion that his parents, who were his only living family, would dispose of all the history materials, stacked neatly with hundreds of photos in his Purdue office. At the time of his death, the history was not published.Donald Stikeleather, personal assistant, personal communication, May 2, 2011.
