Note 121:3 — Chapter V · Mad Folk in Comedy and Tragedy. (ii.) Imbecility.
Reading edition
It is interesting to compare the higher conception of Caliban seen in Browning’s “Caliban upon Setebos,” where, though the brute sprawls “with elbows wide, fists clenched to prop his chin,” in the “cool slush,” he nevertheless reasons vaguely upon such problems as the existence of evil, of pain, and of a law governing the universe.