I just stumbled onto Nancy Willard's interesting-sounding book of poems for children by a kind of circuitous route, while researching the illustrators, Alice and Martin Provensen. See, they'd done a sweet and simple version of Robert Louis Stevenson's A Child's Garden of Verses in 1951.
But the illustrations for Willard's 1981 book, A Visit to William Blake's Inn: Poems for Innocent and Experienced Travelers, seem more like their signature 19th century folk-ish style. [Actually, I can only find the covers; there may not be a single picture in there, who knows?]
Willard reimagined the characters of William Blake's poems as guests at an inn, and wrote her own poems about them, a pretty bold move, which paid off in the form of Newberry and Caldecott medals. [Do illustrators resent having their work defaced by big-ass foil medals? A bold illustrator would work a medal-shaped element into her cover art, you know, just in case.]
We've been working a bit on finding some good poetry for the kid to soak up; this sounds worth a try. Plus, used copies start at a penny.