Author
“In 1951, E. B. White — the novelist responsible for, most notably, Charlotte’s Web and Stuart Little — was accused by the ASPCA of not paying his dog tax and, as a result, “harboring” an unlicensed dog.”
He responded with this quirky little letter (Letters of Note).
Illustrator
A few of 19th century children’s book illustrator Peter Newell’s topsy-turvy illustrations (mental_floss Blog). (A topsy-turvy is a design or picture that looks right either right side up or upside-down.)
You can page through Newell’s Topsys and Turvys in Google Books. (That title looks so wrong to me; I would have spelled it the right way: “Topsies and Turvies”.)