In this quote from The Odyssey, the Cyclops has eaten another brace of Odysseus's men. A brace usually refers to game, such as rabbits or pheasants, and means "two." Therefore, the Cyclops has eaten two more of Odysseus's men.
To figure out what "brace of men" is, we first need to define metaphor, simile, and personification. A metaphor is a comparison that does not use the words like or as. A simile is a comparison that uses the words like or as. Personification is attributing human characteristics to an animal or object.
We can count out simile, as the words like or as do not appear in the sentence. The statement is also not attributing human traits to a non-human object; in fact, it does the opposite. It compares human beings to game animals by referring to them as a brace. Therefore, this sentence contains a metaphor.