In Canto Four of his poem John Shade (the poet in VN's novel Pale Fire, 1962) calls his Muse "my versiple:"
Dressing in all the rooms, I rhyme and roam
Throughout the house with, in my fist, a comb
Or a shoehorn, which turns into the spoon
I eat my egg with. In the afternoon
You drive me to the library. We dine
At half past six. And that odd muse of mine,
My versipel, is with me everywhere,
In carrel and in car, and in my chair. (ll. 941-948)