The silent workings of my mind are of little interest to anyone but me, yet occasionally I feel the need to chronicle some small discovery; to write it down so that it might continue to exist after I have been forgotten.Once a year I write a Monday Morning Memothat is more for methan it is for youand this is that one.If you quit reading now, I’ll understand.In Cervantes’ book of 1605, Don Quixote never meets Dulcinea. She exists only in his mind. Psychologist Carl Jung would call her Quixote’s “anima,” the imaginary woman that represents the innermost heart of a man.But in Man of La Mancha, the 1966 Broadway play by Dale Wasserman, Dulcinea is an actual woman, a reluctant prostitute in whom Don Quixote sees only purity, beauty and grace. That play won 5 Tony Awards and ran for 2,328 performances. In 1972, it was made into a major motion picture starring Peter O’Toole as Don Quixote and Sophia Loren as Dulcinea.Dale Wasserman got the credit, but the character relationships and narrative arc of Man of La Mancha belong entirely to John Steinbeck.Follow my trail of breadcrumbs and I will tell you what I know.1952: The prologue to East of Eden tells us that Steinbeck was familiar with Cervantes and Don Quixote. In it, he speaks to his editor and close friend, Pat Covici:Miguel Cervantes invented the modern novel and with his Don Quixote set a mark high and bright. In his prologue, he said best what writers feel—the gladness and the terror.“Idling reader,” Cervantes wrote, “you may believe me when I tell you that I should have liked this book, which is the child of my brain, to be the fairest, the sprightliest and the cleverest that could be imagined, but I have not been able to contravene the law of nature which would have it that like begets like—”And so it is with me, Pat……Cervantes ends his prologue with a lovely line. I want to use it, Pat, and then I will be done. He says to the reader: “May God give you health—and may He be not unmindful of me, as well.”John Steinbeck1953: Ernie Martin, the Broadway producer of Guys and Dolls, asks Steinbeck to write a sequel to Cannery Row so that it might be made into a play.I have in my possession the Christmas gift John Steinbeck sent Ernie Martin later that year, just as Steinbeck was beginning to write Sweet Thursday. It’s a copy of the 1949 edition of The Ingenious Gentleman Don Quixote de la Mancha. Inscribed on the front endpaper of that book is a note written and signed by John Steinbeck.Dear Ernie -:This is required preparation for Project X.John Steinbeck,Xmas 19531954: John Steinbeck publishes Sweet Thursday, a love story between “Doc” of Cannery Row and Suzy, a reluctant prostitute from the Bear Flag Hotel. Steinbeck’s note to Ernie Martin makes it clear that Suzy is Dulcinea.1955: Sweet Thursday becomes a Broadway play called Pipe Dream with a musical score by Rodgers and Hammerstein. The play receives the largest advance ticket sales in Broadway history to that point, $1.2 million, and is nominated for 9 Tony Awards.I think it would be safe to say that Dale Wasserman, a lifelong playwright, would have been very much aware of Pipe Dream in 1955.1957: John Steinbeck writes 114 pages of Don Kehan—The Marshall of Manchon, but he abandons...