Complex sentence: By 1838, Analostan had almost doubled in length toward the south and by 1884, the new southern part of Analostan Island was defined and built up, and supported a well-established wetland.
Split into simpler sentences: By 1838, Analostan had almost doubled in length toward the south. By 1884, the new southern part of Analostan Island was defined and built up, and supported a well-established wetland.