022 Isaac Casaubon

As of August 21, 2023, the entry for the sixteenth century scholar (and namesake of a famous character in Eliot's Middlemarch) Isaac Casaubon does not yet mention—in the "Literary Appearances" section—that he is discussed at length in Nicholson Baker's novel Room Temperature. 

021 Et in Arcadia Ego

 As of December 9, 2021, the entry for the painting "Et in Arcadio Ego" includes a section on literary and pop cultural references to the title phrase, but it does not yet mention the fact that Vladimir Nabokov references it in his novel Pale Fire. See p. 237 of the Vintage International edition.

020 George Dandin

As of December 12, 2019, the Wikipedia entry for the Molière comedy George Dandin ou le Mari confondu does not yet mention that it is the origin of a well-known conventional phrase or tag, tu l'as voulu, George Dandin (lit. "you have wanted it, George Dandin," and used in the sense of "you have brought it on yourself"). The phrase appears in Saul Bellow's The Adventures of Augie March, Fyodor Dostoevsky's The Idiot, and other works.

019 Leo Africanus

As of Sunday, September 15, 2019, the entry for the Renaissance-era traveler and geographer Leo Africanus does not yet mention what is perhaps his most famous posthumous activity -- namely, that of appearing as a spirit guide and daemon companion to the poet W.B. Yeats, in his various spiritualist explorations. See Richard Ellmann's study, Yeats: The Man and the Masks.

018 Swan Lake

As of Thursday, August 22, the Wikipedia entry for Tchaikovsky's "Swan Lake" lists several songs that have borrowed heavily from the ballet's music -- but it does not yet list the Khmer song "The Story of My Love" by Chhuon Malay, which is featured in the soundtrack of the 2015 documentary Don't Thing I've Forgotten. Go and have a listen - it's totally the act II theme from "Swan Lake." And it's awesome!!

017 Krusty Gets Kancelled

The entry on the 1993 episode of The Simpsons (penned by that great lover of old-times Americana John Swartzwelder) "Krusty Gets Kancelled" mentions a number of cultural allusions contained in the show. It does not yet mention, however, perhaps the most important pop cultural reference in this tale of Gabbo, the demented ventriloquist's dummy: the allusion to the urban legend about "Uncle Don's" notorious blooper (which never actually happened). The entry on A Face in the Crowd ought to mention the debt the film owes to the Uncle Don story as well.

016 The Barefoot Boy

The article on the John Greenleaf Whittier poem "The Barefoot Boy" does not yet mention that the poem is referenced by Mr. Burns in an episode of The Simpsons. He says: "I was once a barefoot boy with cheek of tan," quoting the poem. He is speaking at this moment to Snappy the Alligator, held by Mr. Smithers.