Note 22 — BOOK XII.
Reading edition
The wandering cliffs are certainly intended, for when Ulysses is recapitulating his adventures in Book xxiii. he expressly mentions having reached the πλαγκτὰς πέτρας, just after the Sirens, and before Scylla and Charybdis (xxiii. 327). The writer is determined to have them in her story however little she may know about them.