Charles Schulz writing to Walt Kelly (late 1954):
My book is filled with so much bad work, that I would consider it presumptuous on my part to send you one. After the first book came out, I wished that they would put out another so that my more recent work would show up. Now that the second book is out, I am just so much ashamed. Where does it all end?
Which may explain why it wasn’t until The Complete Peanuts that
those strips in the first Peanuts book were once again published.
Nat Gertler’s The AAUGH Blog shares, with a link to the Sparky and Walt letters.