The "Broken Spears" account describes how Spaniards revealed their greed in the Aztec capital. Detail one specific way that the Spaniards displayed this greed, according to the "Broken Spears" account. Provide one contrasting specific example from Bernal Díaz's account, which records the moment that Spaniards under the command of Cortéz realized they could acquire great wealth from the Aztec Empire.