From William Hazlitt's essay *On the Ignorance of the Learned* (1821). Select the word that fits the blank. "Such a one may be said to carry his understanding about with him in his pocket, or to leave it at home on his library ______."

Hazlitt's image: the learned reader's understanding lives **in books**, not in his own mind — so when he leaves home, he either *carries it in his pocket* (a book in his hand) or *leaves it at home* on the **shelves** (where the books are stored). *Shelves* completes the library imagery; the other options don't fit *library*.