Here& #39;s a few interior illustrations from O Gnomo (The Hobbit), published in 1962. These are by António Quadros.
And here are some interior illustrations from the Soviet edition of The Hobbit (1976) by Mikhail Belomlinsky.
Tove Jansson& #39;s 1962 illustrations for The Hobbit are memorably spooky, as well as delightful.