What Is an Example of a Pun in "Julius Caesar"?

William Shakespeare's play "Julius Caesar" contains a pun in which a cobbler plays with the implied double meaning of the word "soles," which is a homophone for "souls." This line of dialogue appears in Act 1, Scene 1 of the play and is spoken by the Second Commoner, who wittingly says to Marullus, "A trade, sir, that, I hope, I may use with a safe conscience; which is, indeed, a mender of bad soles." Spoken thusly, it is unclear whether the speaker is a mender of soles, as in shoes, or souls, as in a person's moral fiber.