Complex sentence: Montopolis was actually settled in the 1830s as a separate community southeast of Downtown Austin in south central Travis County when Jessie C. Tannehill built a cabin and laid out a townsite to be called Montopolis for its location on top of a hill.
Split into simpler sentences: Montopolis was actually settled in the 1830s as a separate community southeast of Downtown Austin in south central Travis County. The site was settled in the 1830s, when Jessie C. Tannehill built a cabin and laid out a townsite to be called Montopolis for its location on top of a hill.