In following piece of text, why author used him instead of himself?
In the 1500s, the Spanish explorer Cortes met the Aztecs. Cortes became quiet interested in plantations where the Aztecs cultivated chocolate trees. When he returned to Europe, he took cacao beans with
him. He introduced the people of Spain to the Aztecs' chocolate beverage.
Reference: 4000 Essential English words, Paul Nation, Book 4
According to here we not use reflexive pronoun:
After a preposition of place or location we use a personal pronoun and not a reflexive pronoun.
Is this true for the above situation?