Complex sentence: However, they stopped temporarily in the Nevis Island, where Eastchurch met and married a rich heiress (whose name could not be found in any documentation), so he decided to go on a honeymoon with her, staying on the island longer.
Split into simpler sentences: However, they stopped temporarily in the Nevis Island, where Eastchurch met and married a rich heiress. Eastchurch decided to go on a honeymoon with her, staying on the island longer.