I believe Tove Jansson also painted the color cover for the first authorized American edition of Fellowship of the Ring (1965). In _Letters_ one can read Tolkien’s reaction. He was quite taken aback, calling out the Emus (!) in the foreground. As if “ the illustrator hadn’t read my book.”

The 1973 Ballantine editions carried only Tolkien’s own paintings on the covers and slipcase.

I only learned of her involvement after becoming a huge Jansson fan. I had to take another look at the Emu.