As you may have read, an anonymous donor recently gifted a complete set of the original art to Amazing Fantasy #15, in which the first Spider-Man story, by Steve Ditko and Stan Lee, appeared, to the Library of Congress.
This is the story Morten Søndergård in an article published on this site, suggested was based on layouts by Kirby. This hypothesis was subsequently rejected by a number of specialists. I hereby post an image of one of the original pages as Exhibit A: what do YOU think? Is there any Kirby in it? (more images at the link).
Bonus: Charles Yoakum speculates about the identity of the donor.
UPDATE: Blake Bell has a slew of info on the original AF #15 pages, including images of all of them, up on his Ditko website.