Scans of original art are from the Kirby Museum's Original Art Digital Archive.
Scans of pencil art photocopies for the Kirby Museum's Pencil Art Photocopy Archive courtesy of the Kirby Family, with thanks to TwoMorrows Publishing.
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ZOOM in and have a look at panel three here. You can see it's Kirby's penciled text in the balloons and captions on many early pages at Marvel. In panel three you can see the text has been changed in part by Lee. Kirby writes "...on the (layer?) of emerald and I was through." That doesn't match the last bit of Lee's text. In the same panel you can see traces of Kirby's lettering in the balloon and evidence of Lee's rewrite.