Complex sentence: The first white settler in the area was a man named Reed, who took up residence in the early 1850s, when he built a substantial log house that in 1858 became a stop for the Butterfield Overland Mail stagecoach line.
Split into simpler sentences: The first white settler in the area was a man named Reed, who took up residence in the early 1850s. Reed then built a substantial log house that in 1858 became a stop for the Butterfield Overland Mail stagecoach line.