Pappy delivers the groceries! He's posted a page by page / script to art comparison of the Gardner Fox / Joe Kubert Hawkman story "Earth's Impossible Day" from the 1962 The Brave and the Bold #44.
Heavily edited & re-written by Julie Schwartz, as you can see, but oh-so-beautifully drawn by Kubert! (And the story of how he acquired the script is pretty amusing, too.)
If you like classic comics, give Pappy's Golden Age Comics Blogzine a look; he's got lotsa fascinating stuff!