I was gobsmacked to discover, recently, that over several days in 1978, George Lucas, Steven Spielberg, and the screenwriter Lawrence Kasdan worked through an idea Lucas had for a film called “Raiders of the Lost Ark,” and they recorded the sessions. And there’s a transcript. And it’s online. …

The hero, Lucas explains, is a globe-trotting archaeologist, “a bounty hunter of antiquities.” He’s a professor, a Ph.D.—“People call him doctor.” But he’s a little “rough and tumble.” As the men hash out the Jones iconography, they refer, incessantly, to other films, invoking Eastwood, Bond, and Mifune. He will dress like Bogart in “The Treasure of the Sierra Madre,” Lucas says: “the khaki pants…the leather jacket. That sort of felt hat.” Oh, and also? “A bullwhip.” He’ll carry it “rolled up,” Lucas continues. “Like a snake that’s coiled up behind him.”

“I like that,” Spielberg says. “The doctor with the bullwhip.” …

Lucas captures the second act of the film pretty aptly:

“In the essence it’s just bullshit stuff where he wanders around Cairo trying to uncover the mystery of his puzzle. At the same time, you meet all these interesting characters and every once in a while somebody throws a knife at him, or he beats somebody up, or somebody beats him up. Typical Middle Eastern stuff.