According to the Greek philosopher Plato, the mythological island of Atlantis was a rich land, full of vegetation and mines of valuable minerals. At the center of (this/this island) was a fertile plain.
Step 1. This is a vague pronoun. The intended antecedent is island.
Step 2. Add island after this to clarify the antecedent.
On a hill in the center of the island was a shrine to the gods Poseidon and Cleito, surrounded by a golden wall that people were forbidden to enter. Next to (this/this shrine) was a temple to Poseidon.
Step 1. This is a vague pronoun. The intended antecedent is shrine.
Step 2. Add shrine after this to clarify the antecedent.
(This/This temple) was covered all over in silver, except for the statues, which were of gold.
Step 1. This is a vague pronoun. The intended antecedent is temple.
Step 2. Add temple after this to clarify the antecedent.
On the crowded area around (this/this shrine) were rings of land with houses on them.
Step 1. This is a vague pronoun. The intended antecedent is shrine.
Step 2. Add shrine after this to clarify the antecedent.
Two springs, hot and cold, provided unlimited water supplies to the temple, as well as to indoor heated baths. (These/These baths) were used by kings, commoners, women, and horses.
Step 1. These is a vague pronoun. The intended antecedent is baths.
Step 2. Add baths after this to clarify the antecedent.
