The underlined portion "Cynthia's Brow" is an example of a metaphor. It is comparing someone's brow to that of Cynthia's, using it to describe the appearance or characteristics of that person's brow.
personification
alliteration
allusion
Please provide the specific passage from "Huckleberry Finn" with the underlined portion for me to identify the literary term contained within it.
metaphor
simile
it's hard
personification
oxymoron
allusion
the devil
alliteration